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What is the meaning of return in javascript

王林
王林Original
2021-07-08 13:54:522941browse

The meaning of return in JavaScript is to terminate the execution of the function and return the value of the function, such as [return a * b;], which means returning the product of a and b.

What is the meaning of return in javascript

#The operating environment of this article: windows10 system, javascript 1.8.5, thinkpad t480 computer.

The return statement in JavaScript can terminate the execution of the function and return the value of the function.

Let’s take a look at its syntax format:

return [[expression]];

Return the value of expression. If ignored, that is, return; returns undefined.

Look at the specific code example:

Calculate the product of two numbers and return the result:

var x = myFunction(4, 3);        // 调用函数,将返回值赋予 x 变量
function myFunction(a, b) {
    return a * b;                // 函数返回 a 和 b 的乘积
}

xThe output result is:

12

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