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JavaScript | RegExp \r Metacharacter
  • Last Updated : 22 Apr, 2019

The RegExp \r Metacharacter in JavaScript is used to find the carriage return character (Carriage return means to return to the beginning of the current line without advancing downward). If it is found it returns the position else it returns -1.

Syntax:

/\r/ 

or

new RegExp("\\r")

Example 1: This example searches for the carriage return character in the string.




<!DOCTYPE html>
<html>
  
<head>
    <title>
        JavaScript RegExp \r Metacharacter
    </title>
</head>
  
<body style="text-align:center">
      
    <h1 style="color:green">
        GeeksforGeeks
    </h1>
      
    <h2>RegExp \r Metacharacter</h2>
      
    <p>Input String: GeeksforGeeks@_123_$</p>
      
    <button onclick="geek()">
        Click it!
    </button>
      
    <p id="app"></p>
      
    <script>
        function geek() {
            var str1 = "GeeksforGeeks@_123_$";
            var regex4 = /\r/;
            var match4 = str1.search(regex4);
            if(match4 == -1) {         
                document.getElementById("app").innerHTML
                = "No carriage return character present. ";
            } else {
                document.getElementById("app").innerHTML
                = "Index of carriage return charcter: " + match4;
            }
        }
    </script>
</body>
  
</html>                    

Output:
Before Clicking the button:
backr
After Clicking the button:
backr



Example 2: This example searches the position of the carriage return character in the string.




<!DOCTYPE html>
<html>
  
<head>
    <title>
        JavaScript RegExp \r Metacharacter
    </title>
</head>
  
<body style="text-align:center">
      
    <h1 style="color:green">
        GeeksforGeeks
    </h1>
      
    <h2>RegExp \r Metacharacter</h2>
      
    <p>String: 123ge\reky456</p>
      
    <button onclick="geek()">
        Click it!
    </button>
      
    <p id="app"></p>
      
    <script>
        function geek() {
            var str1 = "123ge\reky456";
            var regex4 = new RegExp("\\r");         
            var match4 = str1.search(regex4);
              
            document.getElementById("app").innerHTML
            = " Index of carriage return character: "
            + match4;
        }
    </script>
</body>
  
</html>                    

Output:
Before Clicking the button:
backr
After Clicking the button:
backr

Supported Browsers: The browsers supported by RegExp \r Metacharacter are listed below:

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



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