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JavaScript RegExp [0-9] Expression

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The RegExp [0-9] Expression in JavaScript is used to search any digit which is between the brackets. The character inside the brackets can be a single digit or a span of digits. 

Syntax: 

/[0-9]/ 

or

new RegExp("[0-9]")

Syntax with modifiers:

/[0-9]/g 

or

new RegExp("[0-9]", "g")

Example 1: This example searches the digits between [0-4] in the whole string. 

Javascript

function geek() {
    let str1 = "123456790";
    let regex4 = /[0-4]/g;
    let match4 = str1.match(regex4);
 
    console.log("Found " + match4.length
        + " matches: " + match4);
}
geek()

                    

Output
Found 5 matches: 1,2,3,4,0

 Example 2: This example searches the digits between [0-9] in the whole string and replaces the characters with hash(#). 

Javascript

function geek() {
    let str1 = "128@$%";
    let replacement = "#";
    let regex4 = new RegExp("[0-9]", "g");
    let match4 = str1.replace(regex4, replacement);
 
    console.log(" New string: " + match4);
}
geek()

                    

Output
 New string: ###@$%

 Supported Browsers: The browsers supported by RegExp [0-9] Expression are listed below.

  • Google Chrome
  • Apple Safari
  • Mozilla Firefox
  • Opera
  • Internet Explorer

We have a complete list of Javascript RegExp expressions, to check those please go through this JavaScript RegExp Complete Reference article.

We have a Cheat Sheet on Javascript where we covered all the important topics of Javascript to check those please go through Javascript Cheat Sheet-A Basic guide to JavaScript.  



Last Updated : 30 May, 2023
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