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
  • Match everything enclosed
    (?:...)
  • Capture everything enclosed
    (...)
  • 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
No Match

/
/

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @/ . /; string input = @"An de snou frai and de colei grei Chicago mun beby beibi Charlis morlis de In the guetto (In the guetooo). An de jar mama crai Cosinifi guan sido sido ni modrili yian grin monfi in de gue e to. [my_shortcode id=""1"" type=""lorem""]lorem ipsum dolor sit amet[/my_shortcode] Pipol yon ondre tain de chili jil pija. E jil grou yon gui yon man dei. Toque lo que yu an mi. A güi chi blai chu si. De güi simpli ten an qüen. Anblon delon de güei Güedengüelten. [my_shortcode id=""2"" type=""In-sollicitudin""]In sollicitudin ullamcorper dolor[/my_shortcode] A de güelguei jei qui lo you güi re ni brus prisis tri yi guai brus in de guetoooo. An de jan gai ben. So si estarer churruan estrit nai li chus tul fili ji fanch fisin de gueto (In the guetooo)."; Match m = Regex.Match(input, pattern); Console.WriteLine("'{0}' found at index {1}", m.Value, m.Index); } }

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 C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx