The exec method searches string for text that matches regexp. If it finds a match, it returns an array of results; otherwise, it returns null.
Its syntax is as follows −
RegExpObject.exec( string );
string − The string to be searched
Returns the matched text if a match is found, and null if not.
Try the following example program.
<html> <head> <title>JavaScript RegExp exec Method</title> </head> <body> <script type="text/javascript"> var str = "Javascript is an interesting scripting language"; var re = new RegExp( "script", "g" ); var result = re.exec(str); document.write("Test 1 - returned value : " + result); re = new RegExp( "pushing", "g" ); var result = re.exec(str); document.write("<br />Test 2 - returned value : " + result); </script> </body> </html>
Test 1 - returned value : script Test 2 - returned value : null