JavaScript - Array unshift() Method


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Description

Javascript array unshift() method adds one or more elements to the beginning of an array and returns the new length of the array.

Syntax

Its syntax is as follows −

array.unshift( element1, ..., elementN );

Parameter Details

element1, ..., elementN − The elements to add to the front of the array.

Return Value

Returns the length of the new array. It returns undefined in IE browser.

Example

Try the following example.

<html>
   <head>
      <title>JavaScript Array unshift Method</title>
   </head>
   
   <body>
   
      <script type="text/javascript">
         var arr = new Array("orange", "mango", "banana", "sugar");
         
         var length = arr.unshift("water");
         document.write("Returned array is : " + arr );
         document.write("<br /> Length of the array is : " + length );
      </script>
      
   </body>
</html>

Output

Returned array is : water,orange,mango,banana,sugar
Length of the array is : 5 

javascript_arrays_object.htm

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