JavaScript RegExp [0-9] Expression
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.
html
< h1 style = "color:green" > GeeksforGeeks </ h1 > < h2 >RegExp [0-9] Expression</ h2 > < p >Input String: 1234567890</ p > < button onclick = "geek()" > Click it! </ button > < p id = "app" ></ p > < script > function geek() { var str1 = "123456790"; var regex4 = /[0-4]/g; var match4 = str1.match(regex4); document.getElementById("app").innerHTML = "Found " + match4.length + " matches: " + match4; } </ script > |
Output:
![RegExp [0-9] Expression](https://media.geeksforgeeks.org/wp-content/uploads/20230106095408/animation-of-reg.gif)
RegExp [0-9] Expression
Example 2: This example searches the digits between [0-9] in the whole string and replaces the characters with hash(#).
html
< h1 style = "color:green" > GeeksforGeeks </ h1 > < h2 >RegExp [0-9] Expression</ h2 > < p >Input String: 128@$%</ p > < button onclick = "geek()" > Click it! </ button > < p id = "app" ></ p > < script > function geek() { var str1 = "128@$%"; var replacement = "#"; var regex4 = new RegExp("[0-9]", "g"); var match4 = str1.replace(regex4, replacement); document.getElementById("app").innerHTML = " New string: " + match4; } </ script > |
Output:
![RegExp [0-9] Expression](https://media.geeksforgeeks.org/wp-content/uploads/20230106095556/animation-of-reg2.gif)
RegExp [0-9] Expression
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.
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