How To Use String Object Substr In JavaScript

In this article I am going to explain about String Object Substr In JavaScript.
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Use substr() method in JavaScript

The substr() method is used to read the all character set and select the position of specified character set, and return a specified number of character.

This method extract characters from the end of the string.

This method use a negative start number.

The substr() method does not change the original string in JavaScript.

All browsers support string object substr method, (This does not work in IE8).




<!DOCTYPE html>


<body style ="background-color :Red">


<p id="demo">Extract parts of the string.</p>


<button onclick="myFunction()">Click here</button>


<script type="text/javascript">

    function myFunction() {

        var str = "Welcome India!";

        var n = str.substr(3, 5);

        document.getElementById("demo").innerHTML = n;










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