Syntax error What is the role of special characters in JavaScript Regular Expressions?

What is the role of special characters in JavaScript Regular Expressions?

The frequency or position of bracketed character sequences and single characters can be denoted by a special character. Each special character has a specific connotation. The +, *, ?, and $ flags all follow a character sequence.

Sr.No
 Expression & Description
1
 p+
It matches any string containing one or more p's.
2
 p*
It matches any string containing zero or more p's.
3
 p?
It matches any string containing at most one p.
4
 p{N}
It matches any string containing a sequence of N p's
5
 p{2,3}
It matches any string containing a sequence of two or three p's.
6
 p{2, }
It matches any string containing a sequence of at least two p's.
7
 p$
It matches any string with p at the end of it.
8
 ^p
It matches any string with p at the beginning of it.

Example

You can try to run the following code to learn how to work with special characters in JavaScript Regular Expressions −

<html>
   <head>
      <title>JavaScript Regular Expressions</title>
   </head>
   <body>
      <script>
         var myStr = "Welcome to our website! Welcome to Tutorialspoint!";
         var reg = /Wel*/g;

         var match = myStr.match(reg);

         document.write(match);
      </script>
   </body>
</html>
Updated on: 2020-06-23T07:21:43+05:30

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