JavaScript: return statement

Last update on May 28 2022 10:26:54 (UTC/GMT +8 hours)

Description

The return statement returns a value and exits from the current function.

Version

Implemented in JavaScript 1.0

Syntax

return expression

Parameters

expression: The expression to return. If not present, the function does not return a value.

Example:

In the following web document rectangle_area() function returns the area of a rectangle.

HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset=utf-8>
<title>JavaScript return statement :  Example-1</title>
<script type="text/javascript">
function rectangle_area(h,w)
{
return h*w;
}
</script>
</head>
<body>
<h1 style="color: red">JavaScript : return statement</h1>
<hr />
<script type="text/javascript">
console.log("Area of the Rectangle " +rectangle_area(400,300)+" sq.ft.");
</script>
</body>
</html>

View the example in the browser

Practice the example online

See the Pen return-1 by w3resource (@w3resource) on CodePen.

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JavaScript: Tips of the Day

How to insert an item into an array at a specific index (JavaScript)?

What you want is the splice function on the native array object.

arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:

var arr = [];
arr[0] = "Jani";
arr[1] = "Hege";
arr[2] = "Stale";
arr[3] = "Kai Jim";
arr[4] = "Borge";

console.log(arr.join());
arr.splice(2, 0, "Lene");
console.log(arr.join());

Ref: https://bit.ly/2BXbp04