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.
<!DOCTYPE html> <html> <head> <title> JavaScript RegExp [0-9] Expression </title> </head> <body style="text-align:center"> <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> </body> </html> |
chevron_right
filter_none
Output:
Before Clicking the button:
After Clicking the button:
Example 2: This example searches the digits between [0-9] in the whole string and replaces the characters with hash(#).
<!DOCTYPE html> <html> <head> <title> JavaScript RegExp [0-9] Expression </title> </head> <body style="text-align:center"> <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> </body> </html> |
chevron_right
filter_none
Output:
Before Clicking the button:
After Clicking the button:
Supported Browsers: The browsers supported by RegExp [0-9] Expression are listed below:
- Google Chrome
- Apple Safari
- Mozilla Firefox
- Opera
- Internet Explorer
Recommended Posts:
- JavaScript | RegExp (x|y) Expression
- JavaScript | RegExp [^0-9] Expression
- JavaScript | RegExp [^abc] Expression
- JavaScript | RegExp [abc] Expression
- JavaScript | RegExp constructor
- JavaScript | RegExp ? Quantifier
- JavaScript | RegExp \D Metacharacter
- JavaScript | RegExp \xdd Metacharacter
- JavaScript | RegExp \f Metacharacter
- JavaScript | RegExp \r Metacharacter
- JavaScript | RegExp \t Metacharacter
- JavaScript | RegExp \v Metacharacter
- JavaScript | RegExp \xxx Metacharacter
- JavaScript | RegExp ^ Quantifier
- JavaScript | RegExp ?! Quantifier
If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.
