Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression

/
/
g

Test String

Substitution

Processing...

Code Generator

Generated Code

#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox Local $sRegex = "(?i)([aeiou][a-z]*[a-rt-z])s\b" Local $sString = "Money causes teenagers to feel stress. It makes them feel bad about themselves and envy other people. My friend, for instance, lives with her family and has to share a room with her sister, who is very cute and intelligent. This girl wishes she could have her own room and have a lot of stuff, but she can’t have these things because her family doesn’t have much money. Her family’s income is pretty low because her father is old and doesn’t go to work. Her sister is the only one who works. Because her family can’t buy her the things she wants, she feels a lot of stress and gets angry sometimes. Once, she wanted a beautiful dress to wear to a sweetheart dance. She asked her sister for some money to buy the dress. She was disappointed because her sister didn’t have money to give her. She sat in silence for a little while and then started yelling out loud. She said her friends got anything they wanted but she didn’t. Then she felt sorry for herself and asked why she was born into a poor family. Not having money has caused this girl to think negatively about herself and her family. It has caused a lot of stress in her life. " Local $sSubst = "$1" Local $sResult = StringRegExpReplace($sString, $sRegex, $sSubst) MsgBox($MB_SYSTEMMODAL, "Result", $sResult)

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm