JavaScript | RegExp \0 Metacharacter
The RegExp \0 Metacharacter in JavaScript is used to find the NULL character. If it is found it returns the position else it returns -1.
Syntax:
/\0/
or
new RegExp("\\0")Example 1: This example searches for the Null character in the string.
html
<!DOCTYPE html><html><head> <title> JavaScript RegExp \0 Metacharacter </title></head><body style="text-align:center"> <h1 style="color:green"> GeeksforGeeks </h1> <h2>RegExp \0 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 = /\0/; var match4 = str1.search(regex4); if(match4 == -1) { document.getElementById("app").innerHTML = "No Null characters present. "; } else { document.getElementById("app").innerHTML = "Index of Null character: " + match4; } } </script></body></html> |
Output:
Before Clicking the button:
After Clicking the button:
Example 2: This example searches the position of the NULL character in the string.
html
<!DOCTYPE html><html><head> <title> JavaScript RegExp \0 Metacharacter </title></head><body style="text-align:center"> <h1 style="color:green"> GeeksforGeeks </h1> <h2>RegExp \0 Metacharacter</h2> <p>String: 123ge\0eky456</p> <button onclick="geek()"> Click it! </button> <p id="app"></p> <script> function geek() { var str1 = "123ge\0eky456"; var regex4 = new RegExp("\\0"); var match4 = str1.search(regex4); document.getElementById("app").innerHTML = " Index of NULL character: " + match4; } </script></body></html> |
Output:
Before Clicking the button:
After Clicking the button:
Supported Browsers: The browsers supported by RegExp \0 Metacharacter are listed below:
- Google Chrome
- Apple Safari
- Mozilla Firefox
- Opera
- Internet Explorer
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