Category Archives: Java Basic Programs

Java Basic Programs

Java Program to Find Sum of odd digits in a number

In this tutorial, we will learn to create a Java Program to Find sum of odd digits in a number using Java programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following Java programming topics:

Java Operators.
Basic Input and Output function in Java.
Class and Object in Java.
Basic Java programming.
If-else statements in Java.
For loop in Java.
Built in functions.

What is Even number.

Even number are that number that can be divided by two and gives remainder equals to zero and ends with 2,4,6,8 and with 0.
Example: (No/2==0) => (8/2==0) so 8 is a even Number.
Some even numbers are 2, 4, 6, 8, 10.

What is Odd Number

Odd numbers are number that are not divide by 2 and does not give remainder to Zero, when divided by 2, some the odd numbers are end with 1, 3, 5, 7, 9.

Example: (No/2==0) => (5/2==1) so 5 is an Odd Number.

Java Program to Find Sum of odd digits in a number.

In this program we will learn to create a program that will find sum of Odd digits in a given number. Firstly we declare required variable and also initiates required values in variable. Next we take value from user at run time and then after we will find the sum of Odd digits in a given number.

// Java program to find sum of odd value in a number..
import java.util.*;
import java.util.Scanner;

class Odd_sum{

	// Function to reverse the given number
	static int rev(int number)
	{
		int rev = 0;
		while (number != 0) {
			rev = (rev * 10) + (number % 10);
			number /= 10;
		}
		return rev;
	}

	// Function to find the sum of the odd digit numbers
	static void Oddsum(int number)
	{
		number = rev(number);
		int Even = 0, odd=0, count = 1;

		while (number != 0) {

                   

			if (number % 2 == 0)
				Even += number%10;
 			else
 // finding odd number and adding them...
                odd += number % 10;
            number /= 10;
			count++;
		}

		System.out.println("Sum of odd number in a digit = " + odd);
	}


	public static void main(String args[])
	{
		int number;
       // taking values from user..
      Scanner sc=new Scanner(System.in);
      System.out.println("enter any numbers");
      number=sc.nextInt();

		Oddsum(number);
	}
}

// Java program to find sum of odd value in a number..

import java.util.*;

import java.util.Scanner;

class Odd_sum{

// Function to reverse the given number

static int rev(int number)

{

int rev = 0;

while (number != 0) {

rev = (rev * 10) + (number % 10);

number /= 10;

}

return rev;

}

// Function to find the sum of the odd digit numbers

static void Oddsum(int number)

{

number = rev(number);

int Even = 0, odd=0, count = 1;

while (number != 0) {

if (number % 2 == 0)

Even += number%10;

else

// finding odd number and adding them...

odd += number % 10;

number /= 10;

count++;

}

System.out.println("Sum of odd number in a digit = " + odd);

}

public static void main(String args[])

{

int number;

// taking values from user..

Scanner sc=new Scanner(System.in);

System.out.println("enter any numbers");

number=sc.nextInt();

Oddsum(number);

}

Output

In the above program, we have first declared and initialized a set variables required in the program.

number= it will hold entered number.
Even = it will hold sum or even digit.
rev = for reversing a string.

Here in our program we first declared and initialized set of required variables in the program.Then take a value from user at run time.Afterword we pass the given number to function named Oddsum(). where we calculate sum of all odd digit of a given number.

Here we create a method named Oddsum() for finding all the odd number in a digit and adding them at the end return sum of all odd values and print the required output.

Java Program to Find sum of even digits in a number

In this tutorial, we will learn to create a Java Program to Find sum of even digits in a number using Java programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following Java programming topics:

Java Operators.
Basic Input and Output function in Java.
Class and Object in Java.
Basic Java programming. Basic Java programming.
If-else statements in Java.
For loop in Java.

Even number

Even number are that number that can be divided by two and gives remainder equals to zero.

Example: (Number/2==0) => (4/2==0) so 4 is a even Number.

Some even numbers are 2, 4, 6, 8, 10,……

Odd Number

Odd numbers that are not divisible by 2. and does not give remainder = Zero, when divided by 2, some the odd numbers are end in 1, 3, 5, 7, 9, 11……

Java Program to Find sum of even digits in a number

In this program we will learn to create a program that will find sum of even digits in a number. Firstly we declare required header file and variable and also initiates required values in variable. Next we take value from user at run time and then after we will find the sum of even digits in a number.

// Java implementation of the approach
import java.util.*;
import java.util.Scanner;

class Even_sum{

	// Function to reverse the number
	static int rev(int number)
	{
		int rev = 0;
		while (number != 0) {
			rev = (rev * 10) + (number % 10);
			number /= 10;
		}
		return rev;
	}

	// Function to find the sum of the even digit numbers
	static void Sum(int number)
	{
		number = rev(number);
		int Even = 0, odd=0, count = 1;

		while (number != 0) {

                    // finding even number and adding them
			if (number % 2 == 0)
				Even += number%10;
			else
                odd += number % 10;
            number /= 10;
			count++;
		}

		System.out.println("Sum of even number in a digit = " + Even);
	}


	public static void main(String args[])
	{
		int number;
       // taking values from user..
      Scanner sc=new Scanner(System.in);
      System.out.println("enter any numbers");
      number=sc.nextInt();

		Sum(number);
	}
}

// Java implementation of the approach

import java.util.*;

import java.util.Scanner;

class Even_sum{

// Function to reverse the number

static int rev(int number)

{

int rev = 0;

while (number != 0) {

rev = (rev * 10) + (number % 10);

number /= 10;

}

return rev;

}

// Function to find the sum of the even digit numbers

static void Sum(int number)

{

number = rev(number);

int Even = 0, odd=0, count = 1;

while (number != 0) {

// finding even number and adding them

if (number % 2 == 0)

Even += number%10;

else

odd += number % 10;

number /= 10;

count++;

}

System.out.println("Sum of even number in a digit = " + Even);

}

public static void main(String args[])

{

int number;

// taking values from user..

Scanner sc=new Scanner(System.in);

System.out.println("enter any numbers");

number=sc.nextInt();

Sum(number);

}

Output

In the above program, we have first declared and initialized a set variables required in the program.

number= it will hold entered number.
Even = it will hold sum or even digit.
rev = for reversing a string.

Here we first declared and initialized set of variables required in the program. Then we will take a value from user.After that we pass the given number to function named Sum().where we going to calculate sum of all even digit in a given number .

Steps for adding even values.

Take a number from user,.
Declare a variable Even to store the sum of even value in a number.
Reverse a Digit to find last digit of the number.
Now check all the digit is even or not.
If it even then adds it to Even variable, else go to next step
Remove last digit of the number.
Repeat this until the number becomes 0.
And last print the sum of all even digit in a number.

Java Program to Find sum of N Natural numbers

In this tutorial, we will learn to create a Java Program to Find sum of N Natural numbers using Java programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following Java programming topics:

Java Operators.
Basic Input and Output
Class and Object.
Basic Java programming.
Loop in Java
While loop For loops.

What Is Natural Number?

Mathematically ,Natural numbers are those numbers used for counting and ordering,Simply all the counting numbers {1, 2,3.4…} are commonly called Natural numbers.Natural numbers include all the positive integers from 1 to infinity.

Java Program to Calculate the Sum of Natural Numbers

Firstly we declare required header file and variable and also initiates required values in variable. Next we take value from user at run time and then after we will find the sum of all N natural number of given number.

import java.util.Scanner;
public class Natural_num {

    public static void main(String[] args) {

        int num = 10, i = 1, sum = 0; // declaring variables
       System.out.println("Please enter the value of n:");
       Scanner scan = new Scanner(System.in);
       num = scan.nextInt(); // taking value from user..

        while(i <= num) // adding N natural values..
        {
            sum += i;
            i++;
        }
        // Printing sum or N natural Number.
        System.out.println("Sum = " + sum);
    }
}

import java.util.Scanner;

public class Natural_num {

public static void main(String[] args) {

int num = 10, i = 1, sum = 0; // declaring variables

System.out.println("Please enter the value of n:");

Scanner scan = new Scanner(System.in);

num = scan.nextInt(); // taking value from user..

while(i <= num) // adding N natural values..

{

sum += i;

i++;

}

// Printing sum or N natural Number.

System.out.println("Sum = " + sum);

}

Output

In our program we iterate from 1 to the given (15) and adds all numbers to the variable Sum
sum=sum+i. and after calculating value we will print sum or all natural number.

In the above program, we have first declared and initialized a set variables required in the program.

number=to take value from user.
i =For iteration.
sum = for counting sum of numbers.

In the above program, we have first declared and initialized a set variables required in the program. In our program first we will take a value from user.After that we will start loop from 1 to given number.

Within the while loop, we add all values in variable Sum .After calculating values of all natural number between the given numbers natural number.

and finally we print sum of the all “N” Natural number between 1 to given number.

Java Program to Find GCD of N Numbers

In this tutorial, we will learn to create a Java Program to Find GCD of N number using Java programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following Java programming topics:

Java Operators.
Basic Input and Output function in Java.
Class and Object in Java.
Basic Java programming. Basic Java programming.
If-else statements in Java.
For loop in Java.

What Is GCD of HCF?

HCF stands for Highest Common Factor or (GCD) Greatest common divisor .When we finding the factor of two numbers, Highest Common Factor of numbers is the Largest factor that divides these two numbers. The greatest factor found from the common factors is called the GCD=> “is the largest positive integer that divides each of the integers“.

Java Program to Find GCD of N Numbers

In this program we will find GCD of N given number using For loop. We would first declared and initialized the required variables. Next, we would prompt user to input size of an array Later we will find the GCD or HCF of given numbers.

// Java program to find GCD of n numbers..
import java.util.*;
import java.util.Scanner;

class GCD
{
public static void main(String arg[])	
{	
  {
   // taking the size of a array  from user..
    Scanner sc=new Scanner(System.in);
    System.out.println("Enter  a number");
    int number=sc.nextInt();
    // now taing values from user..
    long  arr[]=new long[number];
    System.out.println("Enter "+ number+" numbers");
    for(int i=0;i<number;i++)
    {
	arr[i]=sc.nextLong();     
     }
     long result = arr[0];
     for(int i = 1; i < arr.length; i++)
     {
     result= gcd(result, arr[i]);
     }     
     System.out.println("GCD="+result);
  }
}
// Finding GCD in gcd fucntion..

static long gcd(long a,long b)
  {
    while (b > 0)
    {
        long temp = b;
        b = a % b; 
        a = temp;
    }
    return a;
   }
}

// Java program to find GCD of n numbers..

import java.util.*;

import java.util.Scanner;

class GCD

{

public static void main(String arg[])

{

// taking the size of a array from user..

Scanner sc=new Scanner(System.in);

System.out.println("Enter a number");

int number=sc.nextInt();

// now taing values from user..

long arr[]=new long[number];

System.out.println("Enter "+ number+" numbers");

for(int i=0;i<number;i++)

{

arr[i]=sc.nextLong();

}

long result = arr[0];

for(int i = 1; i < arr.length; i++)

{

result= gcd(result, arr[i]);

}

System.out.println("GCD="+result);

}

// Finding GCD in gcd fucntion..

static long gcd(long a,long b)

{

while (b > 0)

{

long temp = b;

b = a % b;

a = temp;

}

return a;

}

Output

In the above program, we have first declared and initialized a set variables required in the program.

number =It will hold size of an array elements
arr[] =It will hold N number given by user.
i = For iteration.

Let’s see the steps of finding gcd.

* Read the data from user using scanner class method and store those entered values in to the variables arr[].

Now pass the arr[] and result variable to the static method gcd(result,arr[i]) to find GCD.
Where within the function gcd() we will find the greatest common divisor of given values and return the GCD.

Create Electric Bill Calculator Program In java

In this tutorial, we will learn to Create a program of Electric Bill Calculator Program In java using Java programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following Java programming topics:

Java Operators.
Basic Input and Output function in Java.
Class and Object in Java.
Basic Java programming.
If-else statements in Java.
nested if-else statements.
Loop’s in Java.

How to calculate Electricity bill.

Here in this tutorial you will learn to calculate Electricity bill by simply writing Java program . Create Electric Bill Calculator Program In java

Before, writing a program.

first we know about the tariff rates of per unit according to MPEB .Here we are taking some random charges user can alter according to their Electric Broad.

1 to 100 units –rs 10/unit.
100 to 200 units –rs 15/unit.
200 to 300 units – rs 20/unit.
above 300 units – rs 25/unit.

If consumer use electricity between “0-100” unit then he/she have to pay 10 rs per unit, if we consume electricity between 100-200 unit then for the first 100 he/she have to pay 10 per unit (i.e. 100*10), and for remaining pay 15 per unit. Similarly, if consume >200 units then he/she have to pay 10 per unit for the first 100 units 15 per unit for the next 100 units, and 20 per unit for the remaining units. and so on..

Java program to calculate Electricity bill

In this program we will to create a java program to generate electric Bill . We would first declared and initialized the required variables. Next, we would prompt user to input the units. Later we will Calculate Bill.

// Java program to calculate electricity bill..
// declaring required header files
import java.util.*;
import java.util.Scanner;

class Electricity_Bill
{
	// Function to calculate the electricity bill
	public static int Bill(int unit)
	{
		if (unit <= 100) {
			return unit * 10;
		}
		else if (unit <= 200) {
			return (100 * 10)
				+ (unit - 100)
					* 15;
		}
		else if (unit <= 300) {
			return (100 * 10)
				+ (100 * 15)
				+ (unit - 200)
					* 20;
		}
		else if (unit > 300) {
			return (100 * 10)
				+ (100 * 15)
				+ (100 * 20)
				+ (unit - 300)
					* 25;
		}
		return 0;
	}

	public static void main(String args[])
	{
	int unit;	
	Scanner s = new Scanner(System.in);
    System.out.print("Enter number of units ");
    unit = s.nextInt(); // taking value form user..
	System.out.println("Your Bill is= "+Bill(unit));
	}
}

// Java program to calculate electricity bill..

// declaring required header files

import java.util.*;

import java.util.Scanner;

class Electricity_Bill

{

// Function to calculate the electricity bill

public static int Bill(int unit)

{

if (unit <= 100) {

return unit * 10;

}

else if (unit <= 200) {

return (100 * 10)

+ (unit - 100)

* 15;

}

else if (unit <= 300) {

return (100 * 10)

+ (100 * 15)

+ (unit - 200)

* 20;

}

else if (unit > 300) {

return (100 * 10)

+ (100 * 15)

+ (100 * 20)

+ (unit - 300)

* 25;

}

return 0;

}

public static void main(String args[])

{

int unit;

Scanner s = new Scanner(System.in);

System.out.print("Enter number of units ");

unit = s.nextInt(); // taking value form user..

System.out.println("Your Bill is= "+Bill(unit));

}

Output

In the above program, we have first declared and initialized a set variables required in the program.

unit= it will hold entered units.

After that we pass the given unit by user to a user define function “Bill(unit)”

where we calculate Bill according to provided units using nested if-else statement and after calculate bill reruns the bill to main function.

here we will print the charge payable by user for consuming that number of units

Create BMI (Body Mass Index) Calculator In Java

In this tutorial, we will learn to create a Create BMI (Body Mass Index) Calculator In Java using Java programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following Java programming topics:

Java Operators.
Basic Input and Output function in Java.
Class and Object in Java.
Basic Java programming. Basic Java programming.
If-else statements in Java.
For loop in Java.

What is Body Mass Index (BMI)

It is measured on the basis of “health,height and weight”. So it can be calculated by taking the weight in kg and by dividing the square of your height in meters.

Formula of Calculating BMI.

BMI = (Weight in Kg) / (Height in Meters * Height in Meters).

Example
weight = 70 kg, height = 1.2 m
BMI = 70 / (1.65*1.65) = BMI= 25.7 kg/m²

Healthy BMI range is :=> 18.5 kg/m² – 25 kg/m²
Healthy weight for the height ranges :=> 50.4 kgs – 68.1 kgs
You need to Lose 1.9 kgs to reach a BMI of 25 kg/m².

BMI Range	Category
BMI < 18.5	Thinness
BMI 18.5 – 25	Normal
BMI 25 – 30	Overweight
BMI> 30	Obese

Create BMI (Body Mass Index) Calculator In Java

In this program we will find BMI(Body Mass Index). We would first declared and initialized the required variables. Next, we would prompt user to input height and weight.Later we will find the BMI. Let’s have a look at the program.

// creating a java program to find BMI ...
import java.util.Scanner;

public class BMI{

   // creating a method to calculate BMI..
   public static String bmiCalculator(double weight, 
                                    double height) {

      // calculating bmi
      double BMI = weight / ( height * height) ;

      // checking range according to result of BMI.
      if(BMI < 18.5)
      {
      System.out.println("BMI is ="+BMI);
         return "Thinness";
      }
      else if(BMI < 25)
      {
      System.out.println("BMI is ="+BMI);
      return "Normal";
      }
      else if(BMI < 30)
      {
      System.out.println("BMI is ="+BMI);
      return "Overweight";
      }
      else
      {
      System.out.println("BMI is ="+BMI);
       return "Obese";
      }
   }

   public static void main(String[] args) {

      // declaring  variables....
      double weight = 0.0f;
      double Meters = 0.0f;
      String result = null;

      // taking input form user
      Scanner scan = new Scanner(System.in);
      System.out.print("Enter weight in Kg: ");
      weight = scan.nextDouble();
      System.out.print("Enter height in meters: ");
      Meters = scan.nextDouble();

      // calling  BMI  function for calculating BMI index
      result = bmiCalculator(weight,Meters);
      // displaying the result...
      System.out.println(result);
      scan.close();
   }
}

// creating a java program to find BMI ...

import java.util.Scanner;

public class BMI{

// creating a method to calculate BMI..

public static String bmiCalculator(double weight,

double height) {

// calculating bmi

double BMI = weight / ( height * height) ;

// checking range according to result of BMI.

if(BMI < 18.5)

{

System.out.println("BMI is ="+BMI);

return "Thinness";

}

else if(BMI < 25)

{

System.out.println("BMI is ="+BMI);

return "Normal";

}

else if(BMI < 30)

{

System.out.println("BMI is ="+BMI);

return "Overweight";

}

else

{

System.out.println("BMI is ="+BMI);

return "Obese";

}

public static void main(String[] args) {

// declaring variables....

double weight = 0.0f;

double Meters = 0.0f;

String result = null;

// taking input form user

Scanner scan = new Scanner(System.in);

System.out.print("Enter weight in Kg: ");

weight = scan.nextDouble();

System.out.print("Enter height in meters: ");

Meters = scan.nextDouble();

// calling BMI function for calculating BMI index

result = bmiCalculator(weight,Meters);

// displaying the result...

System.out.println(result);

scan.close();

}

Output

BMI

In the above program, we have first declared and initialized a set variables required in the program.

weight =It will hold value of kg.
meter =It will hold value in meter.
BMI = For calculating BMI.

After that taking value of weight in kg and height in meter we pass these values to function bmicalculator (weight,height).

After taking values from user bmicalculator () method takes two arguments and calculate bmi as shown in image below.

Here BMI calculator finds that whether the person is underweight, normal, overweight, or obese and the print result.

Create Simple Calculator Program In Java

In this tutorial, we will learn to create a Java program to make a simple Calculator using Switch case using Java programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following Java programming topics:

Java Operators.
Basic Input and Output
Class and Object.
Basic Java programming.
if-else statements.
Switch case.
Nested if-else Statements.
Java Scanner class.

What is calculator?

Calculator is a Device that is used to performing mathematical operation like arithmetic operations on numbers.With the Calculators we can perform operation like Addition, Subtraction,Multiplication, and Division… and function like that.

Create Simple Calculator Program In Java

In this our program we will create a small calculator using switch case . We would first declared and initialized the required variables. Next, we would prompt user to input the two values . Later in program we will ask operator and perform that particular operation in our program.

// creating a java program for calulator
import java.util.Scanner;

public class Calculator {

    public static void main(String[] args) {

    	double a,b,result; // Declaring a variables 
        Scanner s = new Scanner(System.in);
        System.out.print("Enter first number value:");
        a = s.nextDouble(); // taking values from user...
        System.out.print("Enter second number value:");
        b = s.nextDouble();

        System.out.print("Enter any operator (+, -, *, /): ");
        char opt = s.next().charAt(0); // taking operator

        switch(opt) // using switch case to create Calculator
        {
            case '+':
            	result = a + b;
                break;    // condition for addition

            case '-':
            	result =a - b; 
                break; // condition for subtraction

            case '*':
            	result = a * b;
                break; // condition for Multiplication

            case '/':
            	result = a / b;
                break; // condition for Division

                default: 
                System.out.printf("You have entered wrong operator or value");
                return;
        }

        System.out.println(a+" "+opt+" "+b+": "+result);
    }
}

// creating a java program for calulator

import java.util.Scanner;

public class Calculator {

public static void main(String[] args) {

double a,b,result; // Declaring a variables

Scanner s = new Scanner(System.in);

System.out.print("Enter first number value:");

a = s.nextDouble(); // taking values from user...

System.out.print("Enter second number value:");

b = s.nextDouble();

System.out.print("Enter any operator (+, -, *, /): ");

char opt = s.next().charAt(0); // taking operator

switch(opt) // using switch case to create Calculator

{

case '+':

result = a + b;

break; // condition for addition

case '-':

result =a - b;

break; // condition for subtraction

case '*':

result = a * b;

break; // condition for Multiplication

case '/':

result = a / b;

break; // condition for Division

default:

System.out.printf("You have entered wrong operator or value");

return;

}

System.out.println(a+" "+opt+" "+b+": "+result);

}

Output

In the above program, we have first declared and initialized a set variables required in the program.

a= it will hold First value.
b= it will hold second value.
opt=it will hold operator value.

After declaring variables in the next statement user will be prompted to enter two values and which will be assigned to variable ‘a‘ and ‘b‘ respectively as shown in image below.

Afterword we will ask user to input symbol to perform following task like( +,-,*,/) to perform following task.

After taking values opt we will pass the value of options to switch case to Calculate result

The above statements compute the addition of two numbers and print the output.

and finally we will print the result.

Java Program to Print 1 to 100 Without Loop

Java Program to Print 1 to 100 without using Loop

In this tutorial, we will learn to create a Java program that will Print 1 to 100 without using Loop in Java programming.

Prerequisites

Before starting with this tutorial, we assume that you are the best aware of the following Java programming topics:

Operators in Java Programming.
Basic Input and Output function in Java Programming.
Basic Java programming.
Conditional Statements in Java programming.

Algorithm:-

1. Declaring the main function.

2. Defining the initial value.

3. Calling the user defined function and passing the value.

4. Printing the series from the function.

5. End the program.

1. Declaring the main function.

2. Defining the initial value.

3. Calling the user defined function and passing the value.

4. Printing the series from the function.

5. End the program.

Print 1 to 100 without using Loop:-

As we all know, the series printing works are done using the loops, but today we will print a series from 1 to 100 without using Loop. In this program, we will first define the variables for the program. Then we will pass that variable to a user-defined function to print the series. The function first prints a number and increases the value by 1.

With Java programming, we can make many arithmetic series with just a little code.

With the help of this program, we can Print 1 to 100 without using Loop.

Program:-

// Sample Java Program to Print 1 to 100 without Loop 
import java.util.*;//Importing the packages of java
public class Print1to100 {
    //Body of the main function 
	public static void main(String[] args) 	{
		int number = 1;
		
		printNumbers(number);	
	}
	//Body of the user  defined function 
	public static void printNumbers(int num)
	{
	    //Checkinf the condition for the funtion processing
		if(num <= 100)
		{
		    //Printing the output number to the user by the program.
			System.out.print(num +" "); 
			//Increasing the value of number by 1
			printNumbers(num + 1);
		}	
	}
}

// Sample Java Program to Print 1 to 100 without Loop

import java.util.*;//Importing the packages of java

public class Print1to100 {

//Body of the main function

public static void main(String[] args) {

int number = 1;

printNumbers(number);

}

//Body of the user defined function

public static void printNumbers(int num)

{

//Checkinf the condition for the funtion processing

if(num <= 100)

{

//Printing the output number to the user by the program.

System.out.print(num +" ");

//Increasing the value of number by 1

printNumbers(num + 1);

}

Output:-

In the above program, we have first initialized the required variable.

number = it will hold the integer value for the program.

Sending the data to the user-defined function for the generation of series.

Body of the user-defined function to print the series.

Program code to print the list up to the given number 100.

Java Program to Find Square Root of a Number

In this tutorial, we will learn to create a Java program to Find square Root of a number using Java programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following Java programming topics:

Java Operators.
Basic Input and Output
Class and Object.
Basic Java programming.
if-else statements.
Switch case.
Nested if-else Statements.
Java Scanner class.

What Is Square root?

Method of Finding “Square Root” is that numbers are multiplying by itself Twice “6 * 6= 36”. Where a square root of a number on getting multiplied by itself gives the original √36 = 6.
A square root of a number a is a number b such that b² =a.

Java Program to Find Square Root of a Number

In this our program we will create a program to find “Square Root” of a given number . We would first declared and initialized the required variables. Next, we would prompt user to input value.Later in the program we will find square root.

// java program to caluclate square root...

import java.util.Scanner;  
public class SquareRoot   
{  
public static void main(String[] args)    
{   
System.out.print("Enter a number: ");  
Scanner sc = new Scanner(System.in);  
// taking values form user..  
int number = sc.nextInt();  
System.out.println("The square root of "+ number+ " is: "+square_root(number));  
}  
//declaringa method for finding square root..  
public static double square_root(int number)   
{  
//declaring variables...
double temp;  
double sr=number/2;  
do   
{  
temp=sr;  
sr=(temp+(number/temp))/2;  
}   
while((temp-sr)!= 0);  
return sr;  
}  
}

// java program to caluclate square root...

import java.util.Scanner;

public class SquareRoot

{

public static void main(String[] args)

{

System.out.print("Enter a number: ");

Scanner sc = new Scanner(System.in);

// taking values form user..

int number = sc.nextInt();

System.out.println("The square root of "+ number+ " is: "+square_root(number));

}

//declaringa method for finding square root..

public static double square_root(int number)

{

//declaring variables...

double temp;

double sr=number/2;

{

temp=sr;

sr=(temp+(number/temp))/2;

}

while((temp-sr)!= 0);

return sr;

}

Output

Square Root

In the above program, we have first declared and initialized a set variables required in the program.

number = it will hold given number.
temp= it will hold temporary value of a number
sr= it will square root of a number.

We going to use the following formula to find the square root of a number.

in our program we have created a method square_root(number), in this method we have written a equation for finding the square root of a number.and for equation we have used do while loop.function returns the square root of a given number to main method

Where we will print the required square root of a given number as shown in image.

Java Program to Find HCF of two numbers

In this tutorial, we will learn to create a Java program that will find the HCF of two numbers using Java programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following Java programming topics:

Operators in Java Programming.
Basic Input and Output function in Java Programming.
Basic Java programming.
While loop in Java programming.
Arithmetic operations in Java Programming.

Program Description:-

In Java programming, it is possible to take numerical input from the user and find HCF of two numbers with the help of a very small amount of code. The Java programming language has many types of predefined libraries which have support for the function in them with the help of these arithmetic expressions we can find the HCF. The program first takes the two numbers in input then it will find the HCF using the for loop and the conditional statements. At last, we will print the output HCF to the user.

With the help of this program, we can find HCF.

Here,

HCF:- Highest Common Factor.

Program to find HCF of two numbers:-

import java.util.Scanner;
public class HCF 
{
   public static void main(String args[]){
      //Declaring the required variables for the program.
      int a, b, i, hcf = 0;
      //Taking the input from the user.
      Scanner sc = new Scanner(System.in);
      //Taking the first number form the user.
      System.out.println("Enter first number :: ");
      a = sc.nextInt();
      //Taking the first number form the user.
      System.out.println("Enter second number :: ");
      b = sc.nextInt();
      //Calculating the HCF of two numbers.
      for(i = 1; i <= a || i <= b; i++) {
         if( a%i == 0 && b%i == 0 )
         hcf = i;
      }
      //Printing the output HCF of the numebrs.
      System.out.println("HCF of given two numbers is ::"+hcf);
   }
}

import java.util.Scanner;

public class HCF

{

public static void main(String args[]){

//Declaring the required variables for the program.

int a, b, i, hcf = 0;

//Taking the input from the user.

Scanner sc = new Scanner(System.in);

//Taking the first number form the user.

System.out.println("Enter first number :: ");

a = sc.nextInt();

//Taking the first number form the user.

System.out.println("Enter second number :: ");

b = sc.nextInt();

//Calculating the HCF of two numbers.

for(i = 1; i <= a || i <= b; i++) {

if( a%i == 0 && b%i == 0 )

hcf = i;

}

//Printing the output HCF of the numebrs.

System.out.println("HCF of given two numbers is ::"+hcf);

}

Output:-

In the above program, we have first initialized the required variable.

a = it will hold the integer value1.
b = it will hold the integer value2.
t = it will hold the integer temporary value.
hcf = it will hold the integer value of calculated hcf.

Input number from the user.

Program Logic Code.

Printing output

Java Program to Find Students Grades using Switch Case

In this tutorial, we will learn to create a Java program to Find students Grade using Switch Case using Java programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following Java programming topics:

Java Operators.
Basic Input and Output
Class and Object.
Basic Java programming.
if-else statements.
Switch case.
Nested if-else Statements.
Java Scanner class.

Grade of a Student.

Here we are going to write a Java program to find out students grades using switch case statement. The Table shows the grading system.

Score	Grade
Grade >=90	A
Grade=80-89	B
Grade=70-79	C
Grade=60-69	D
Grade=50-59	E
Grade <50	F

Java Program to Find Students Grades using Switch Case

In this our program we will create a program to find Student Grades using Switch Case. We would first declared and initialized the required variables. Next, we would prompt user to input value.Later in the program we will find Garde.

// Java program to find grade..
import java.util.Scanner;  
public class Student {

   public static void main(String[] args) {
      // score (0-100)
      String grade = null;
      System.out.print("Enter a number: ");  
      Scanner sc = new Scanner(System.in); 
      int score = sc.nextInt(); // Taking value from user at run time 

      switch(score/10) 
      {
        // for >= 90
        case 10:
        case 9:
           grade = "A";
           break;
        // for >= 80 and <90
        case 8:
           grade = "B";
           break;
        // for >= 70 and <80
        case 7:
           grade = "C";
           break;
        // for >= 60 and <70
        case 6:
           grade = "D";
           break;
        // for >= 50 and <60
        case 5:
           grade = "E";
           break;
        // for < 50
        default:
           grade = "F";
           break;
      }
      
      // displaying result...
      System.out.println("Your Grade is  = " + grade);
   }

}

// Java program to find grade..

import java.util.Scanner;

public class Student {

public static void main(String[] args) {

// score (0-100)

String grade = null;

System.out.print("Enter a number: ");

Scanner sc = new Scanner(System.in);

int score = sc.nextInt(); // Taking value from user at run time

switch(score/10)

{

// for >= 90

case 10:

case 9:

grade = "A";

break;

// for >= 80 and <90

case 8:

grade = "B";

break;

// for >= 70 and <80

case 7:

grade = "C";

break;

// for >= 60 and <70

case 6:

grade = "D";

break;

// for >= 50 and <60

case 5:

grade = "E";

break;

// for < 50

default:

grade = "F";

break;

}

// displaying result...

System.out.println("Your Grade is = " + grade);

}

Output

Your Grade

In the above program, we have first declared and initialized a set variables required in the program.

score =it will holds value of score given by user.
Grade= it will provide grade of given score.

In the next statement user will be prompted to enter the score then we will find the Grade according to score given bye user.

Now,we calculated the grade.Grades must be calculated based on following conditions.
Shown in above table using Switch Case as shown in image below.

In our program, we did not use the break statement. Whenever the condition is satisfied value is returned and the control came back to the main method. and according to return value we will print Grade to given score.

Java Program to Find exponents

In this tutorial, we will learn to create a Java Program to find Exponent using Java programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following Java programming topics:

Java Operators.
Basic Input and Output function in Java.
Class and Object in Java.
Basic Java programming.
If-else statements in Java.
For loop in Java.
In-built functions.

Exponent of a Number

Let’s take a value at base : 2
Now take a value at exponent : 3
So power(Exponent) of any number is baseⁿ given as base*base*base (3-times). Here base is called base and 3 is called the exponent.

are some example of exponents.

Java Program to Find exponents

In this program we will find exponent of any given number by user using loop. We would first declared and initialized the required variables. Next, we would prompt user to input the number and power of number .Then we will find the power of given number.

// java program to calculate power of a numebr
import java.util.Scanner;  
public class Test{
    
   public static void main(String[] args) 
      {
      //declaring and initiating variables 
      System.out.print("Enter base: ");  
      Scanner s = new Scanner(System.in);  
      int base = s.nextInt();   
      System.out.print("Enter Power: ");  
      Scanner sc = new Scanner(System.in);  
      int pow = sc.nextInt();   
      // Finding the exponent and printing result..
      System.out.println("Exponent is ="+Math.pow(base, pow));

   }
}

// java program to calculate power of a numebr

import java.util.Scanner;

public class Test{

public static void main(String[] args)

{

//declaring and initiating variables

System.out.print("Enter base: ");

Scanner s = new Scanner(System.in);

int base = s.nextInt();

System.out.print("Enter Power: ");

Scanner sc = new Scanner(System.in);

int pow = sc.nextInt();

// Finding the exponent and printing result..

System.out.println("Exponent is ="+Math.pow(base, pow));

}

Output

Note : The above program works only if the Power is a positive integer (number).

In the above program, we have first declared and initialized a set variables required in the program.

base = it hold the value of base
pow = it will hold the power.

Let see the logic behind the the program

Take value of “base and exponents(Power)” from user, and put it in two variables base and pow respectively.

Here we will to use the “Math.pow(base, pow))” function which is define in Java standard library.it will take two parameter as a arguments base and power and returns the exponent of value supply to it.

At last print the resultant output as shown in image above.

Prerequisites

What is Even number.

What is Odd Number

Java Program to Find Sum of odd digits in a number.

Output

Prerequisites

Even number

Odd Number

Java Program to Find sum of even digits in a number

Output

Prerequisites

What Is Natural Number?

Java Program to Calculate the Sum of Natural Numbers

Output

Prerequisites

Java Program to Find GCD of N Numbers

Output

Let’s see the steps of finding gcd.

Prerequisites

How to calculate Electricity bill.

Java program to calculate Electricity bill

Output

Prerequisites

What is Body Mass Index (BMI)

Create BMI (Body Mass Index) Calculator In Java

Output

Prerequisites

What is calculator?

Create Simple Calculator Program In Java

Output

Java Program to Print 1 to 100 without using Loop

Prerequisites

Algorithm:-

Print 1 to 100 without using Loop:-

Program:-

Output:-

Prerequisites

What Is Square root?

Java Program to Find Square Root of a Number

Output

Java Program to Find HCF of two numbers

Prerequisites

Program Description:-

Program to find HCF of two numbers:-

Output:-

Prerequisites

Grade of a Student.

Score

Grade

Java Program to Find Students Grades using Switch Case

Output

Prerequisites

Exponent of a Number

Java Program to Find exponents

Output