javascript array

JavaScript Array: Examples

Javascript Array is used to store the multiple values in a single variable.

There are 2 ways to create the array in JavaScript

  1. By array literal ([ ])
  2. By array constructor (using new keyword)
var languages = ["PHP", "Java", "C"];

Create Array by array literal

It is easy way to create the Array.

Syntax :

var array_name = [value1, value2, ...];    

Example :

<html>
<head>
<title>Developer Helps | Javascript Array</title>
</head>
<body>
<h2>JavaScript Array Using Literal</h2>
<p id="lang"></p>

<script>
var languages = ["PHP", "Java", "C"];
document.getElementById("lang").innerHTML = languages;
</script>

</body>
</html>

Output :

JavaScript Array Using Literal

PHP,Java,C

Array using new keyword

It creates the Array using array constructor.

Syntax :

var array_name = new Array(value1, value2, ...);

Example :

<html>
<head>
<title>Developer Helps | Javascript Array</title>
</head>
<body>
<h2>JavaScript Array Using New Keyword</h2>
<p id="lang"></p>

<script>
var languages = new Array("PHP", "Java", "C");
document.getElementById("lang").innerHTML = languages;
</script>

</body>
</html>

Output :

JavaScript Array Using New Keyword

PHP,Java,C

Fetch the Elements of an Array

You can fetch the element of array by its index number.

Example :
If you want to fetch the first element of array.

<html>
<head>
<title>Developer Helps | Javascript Array</title>
</head>
<body>
<h2>Fetch Element of Array</h2>
<p id="lang"></p>

<script>
var languages = ["PHP", "Java", "C"];
document.getElementById("lang").innerHTML = languages[0];
</script>

</body>
</html>

Output :

Fetch Element of Array

PHP

Javascript Array Uses as Object

Array is special type of object.

Example :

<html>
<head>
<title>Developer Helps | Javascript Array</title>
</head>
<body>
<h2>Javascript Array as Object </h2>
<p id="lang"></p>

<script>
var programming = {language:"PHP", framework:"Laravel"};
document.getElementById("lang").innerHTML = programming["language"];
</script>

</body>
</html>

Output :

Javascript Array as Object
PHP

Javascript Array Length

The length property return the number of elements in an array. 

Example :

<html>
<head>
<title>Developer Helps | Javascript Array Length</title>
</head>
<body>
<h2>Fetch Length of Array</h2>
<p id="lang"></p>

<script>
var languages = ["PHP", "Java", "C"];
document.getElementById("lang").innerHTML = languages.length;
</script>

</body>
</html>

Output :

Fetch Length of Array
3

Javascript Array Push( ) Method

Push method adds new element to the end of array. This method update the length of array too.

Example :

<html>
<head>
<title>Developer Helps | Javascript Array Push</title>
</head>
<body>
<h2>Add the Element in Javascript Array</h2>
<p id="lang"></p>

<script>
var languages = ["PHP", "Java", "C"];
languages.push("Wordpress","Laravel","Javascript");
document.getElementById("lang").innerHTML = languages;
</script>

</body>
</html>

Output :

Add the Element in Javascript Array
PHP,Java,C,Wordpress,Laravel,Javascript

Thanks for the reading post. I hope you like and understand the post. If you have any doubt regarding this post please comment below.

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