JavaScript returnStatement

JavaScript 语句参考手册 JavaScript Statement Reference

Examples

Return the value of PI:

function myFunction() { return Math.PI; }

Output:

3.141592653589793

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This article contains more examples at the bottom.

Definition and Usage

The return statement stops the execution of a function and returns the value of the function.

Please read our JavaScript tutorial to learn more about functions. First, we can start by understandingJavaScript FunctionsandJavaScript Scope. For more detailed content, you can viewFunction Definitions, Parameters, InvocationandClosures。

Browser Support

Statement
return	Yes	Yes	Yes	Yes	Yes

Syntax

return [[expression]];

Return the value of expression. If omitted, i.e.return;then undefined is returned.

The following return statements all terminate the execution of the function:

return;
return true;
return false;
return x;
return x + y / 3;

Parameter Values

Parameter	Description
value	Optional. Specifies the returned function value. If omitted, will returnundefined

Technical Details

JavaScript Version:	1.0

More Examples

Example

Calculate the product of two numbers and return the result:

var x = myFunction(4, 3); // Call the function, assign the returned value to variable x

function myFunction(a, b) {
return a * b; // The function returns the product of a and b
}

xThe output is:

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