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JavaScript | RegExp [^0-9] Expression

  • Last Updated : 22 Apr, 2019

The RegExp [^0-9] Expression in JavaScript is used to search any digit which is not 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 which are not present 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:
notdigit
After Clicking the button:
notdigit

Example 2: This example searches the digits which are not present 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 =
                    "Found " + match4.length 
                    + " matches: " +  match4;
        }
    </script>
</body>
  
</html>

Output:
Before Clicking the button:
notdigit
After Clicking the button:
notdigit

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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