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Using the exec() method in regular expressions in JavaScript_Basics

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WBOYOriginal
2016-05-16 15:54:491385browse

The exec method searches for a text string matched by a regular expression. If a match is found, the resulting array is returned; otherwise, null is returned.
Grammar

RegExpObject.exec( string );

Here are the details of the parameters:

  • string : The string to search for

Return value:

  • If a match is found, returns the matching text if not empty.

Example: 

<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>

This will produce the following results: 

Test 1 - returned value : script
Test 2 - returned value : null

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