How to replace number with string in JavaScript?

In this article we will discuss replace number with string in javascript by using regular expression . It find the numbers and then replaced with strings which specified. It is achieved by two methods

1.    Using a regular expression literal

2.    Using keyword RegExp object

Using a regular expression literal:

<script type="text/javascript">

    var string = "my contact number is 9545554545. my age is27.";

   alert(string.replace(/\d+/g, "XXX"));

</script>

Input:

my contact number is 9545554545. my age is 27.

Output:

Using a keyword RegExp object:

<script type="text/javascript">

    var string = "pincode of my city 627011";

    var regexp = new RegExp("\\d+", "g");

   alert(string.replace(regexp, "XXX"));

</script>

Input:

pincode of my city 627011.

Output: