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> |
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> |
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
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