The exec() Method in JavaScript is used to test for the match in a string. If there is a match this method returns the first match else it returns NULL.
Syntax:
RegExpObject.exec(str)
Parameters:
- str: It is the string to be searched. This is a required field.
Return value:
- This method returns an array that contains the matched text if the match is found, else it returns null.
Example 1: This example searches for the string “computer” in the original string.
function geek() {
let str =
"GeeksforGeeks is the " +
"computer science portal for geeks." ;
let regex = new RegExp( "computer" ,);
// match "computer" in string.
let rex = regex.exec(str);
console.log(rex.length);
console.log(rex)
} geek() |
1 [ 'computer', index: 21, input: 'GeeksforGeeks is the computer science portal for geeks.', groups: undefined ]
Example 2: This example searches for the string “rep” in the original string.
function geek() {
let str =
"GeeksforGeeks is the" +
" computer science " +
"portal for geeks." ;
let regex = new RegExp( "rep" );
// Match "rep" in string.
let rex = regex.exec(str);
console.log(rex);
} geek() |
null
We have a complete list of Javascript Functions, to check those go through the Javascript Functions Complete Reference article.
Supported Browsers: The browsers supported by the JavaScript exec() Method are listed below:
- Google Chrome
- Apple Safari
- Mozilla Firefox
- Opera
- Internet Explorer
We have a complete list of Javascript RegExp expressions, to check those please go through this JavaScript RegExp Reference article.