In this tutorial you will learn about the Swift guard Statement and its application with practical example.
Swift guard Statement
In Swift, the guard statement enable us to transfer program control out of a scope on specified condition. The guard statements are very similar to swift if statement, but unlike if, the guard statement allows block of code to be executed only when test expression returns False.
Syntax:-
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guard condition else { //statements } |
Here, Condition is a Boolean expression that results in either True or False, if it results in False then statements inside else body are executed, if it results in True then statements inside else body are skipped and control jumps to next statement.The else body must contain a return, break, continue or throw in order to exit from the scope.
Example :-
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func sayHello() { guard false else { print("Hello World!") return } print("Condition met") } print("W3Adda - Swift Guard Statement") sayHello() print("Hello after function call") |
Output:-
