Julia Hello World Program
As usual we will start learning Julia programming by creating “Hello world!” program. The “Hello world!” program is a simplest program that will display some text on the screen. The “Hello world!” program is a simple yet complete program for beginners that illustrates the basic syntax of Julia programming language. The “Hello world!” program gives you a way to test systems and programming environment.
This tutorial will guide you through writing a basic “Hello World!” program in Julia. In Julia Programming, you can do this either by programming it directly in command prompt or you can simply write a program in a file and executing it.
Julia Command Prompt
Let’s open command prompt and run the following command to start the Julia Command prompt.
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julia |
Or you can start Julia Shell directly from programs –
this will launch Julia GUI Shell as following –
Here, you can start writing your program. In Julia Command Prompt, you can print the “Hello World!” as following –
Example :-
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println("Hello world!") |
Output:-
Julia Script File
Step 1:- Create a file called “hello_world.jl” using a text editor program of your choice. The .jl file extension is used to specify Julia file.
Step 2:- Let’s open the “hello_world.jl” file that we created, and put the following line of code in it and save it.
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println("Hello World!") |
The println() is a function that tells the julia to display or output the content inside the parentheses.
Step 3:- Now, open terminal or command prompt and switch to the folder where our “hello_world.jl” file is saved. Run the program by typing the following command –
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julia hello_world.jl |
Once the program is executed it will print “Hello World!” as below –
Output:-
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Hello world! |
Note :- Before executing Julia Script in the command prompt, PATH has to be added to environment variables in advanced system properties.
