Regex Tutorial





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Regex Topics
Introduction Introduction
Common Metacharacter Common Metacharacter's
Metacharacters Metacharacter's
Qualifiers Quantifier's
Word Boundry Word Boundry
Non-word Boundry Non-word Boundry
POSIX Character Classes POSIX-Character Classes
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Forums Ask Your Doubts
 





Regex Regular Expression Tutorial

Tutorial Index



Common Metacharacters

Metacharacter List

Metacharacters

\-backslash
|-pipe
^-caret
$-dollar
.-dot
[]-brace expression
\d-digit
\D-non digit
\n-newline
\s-whitespace
\S-non-whitespace
\w-word
\W-non word
\t-tabspace
\r-carriage return
Quantifiers
{}-braces
?-question
*-asterisk
+-plus
Word Boundry
Non-word Boundry

Character Classes

[:alnum:] Character Class
[:alpha:] character class
[:blank:]
[:cntrl:] character class
[:digit:]
[:graph:] character class
[:lower:]
[:print:]
[:punct:]
[:space:] character class
[:upper:]
[:xdigit:]
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Introduction

Regular Expression is a pattern or sequence of characters. This method is effectively used to match the specific pattern within a string and to extract the pattern of the string precisely to do various manipulations which may include splitting strings, replacing characters. Regex is one of the most powerful ways to do string manipulation. It is preferred for string functions for specific string manipulation needs.
The regex tutorial is aimed at the basics of the Regular expression i.e. to do string manipulation using the basic meta characters available in almost all languages in common.



A Note

Simple Regex Regular Expression Tutorial Online. We welcome your Valuable feedbacks or suggestions. This is a copyright content.


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