JavaScript length Property: Array Object

Last update on August 19 2022 21:51:08 (UTC/GMT +8 hours)

Description

The length property returns number elements of an array. The value of the length property is an integer and less than 2³². The length property is also used to truncate an array. If the length property is set with a number which is greater than the original length then new elements are added to the end of the array. If the length property is set with a number which is less than the original length then excess elements at the end of the array are lost.

Version

Implemented in JavaScript 1.1

Syntax

array.length

Example:

In the following web document length property is used to get the number of elements of a given array.

HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf8" />
<title>JavaScript Array object-length Property example</title>
<style type="text/css">
h1 {color:red}
</style>
</head>
<body>
<h1>JavaScript Array Object : length Property</h1>
<script src="array-length-example1.js">
</script>
</body>
</html>

JS Code

var myarray = new Array("Orange", "Apple", "Banana", "Cherry", "Mango");
var newParagraph = document.createElement("p");
var newText = document.createTextNode("The length of the array is : "+myarray.length); 
newParagraph.appendChild(newText); 
document.body.appendChild(newParagraph);

View the example in the browser

Practice the example above online

JavaScript Array object-length Property example

See also:

JavaScript input Property: Array Object

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