An overview of Regular Expression

Regular expressions are a pattern matching standard for string parsing and replacement. They are used on a wide range of platforms and programming environment

Sample Eg:

Regex	Matches
abc	abcabcabc
234	12345

Anchors:

^ Start of line
\A Start of String
$ End of Line
\Z End of String
\b Word boundary
\B Not word boundary
\< Start of Word
\> End of Word