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
No Match

/
/
gu

Test String

Substitution

Processing...

Code Generator

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"([\p{L}\p{N}_-]+)-\d+"; string substitution = @"$1"; string input = @"<if VERSION-1=""A1"" VERSION-17=""A3""> <assign CTA=""blue""></assign> <assign CTA2=""green""></assign> <assign TEXT1=""Hello%3Cbr/%3EWorld""></assign> <elseif VERSION-147=""A2""> <assign CTA=""red""></assign> <assign CTA2=""yellow""></assign> <assign CTA3=""brown""></assign> <assign TEXT1=""Click%20%3Ca%20href='https://example.com'%20style='text-decoration:none;color:#000000;'%3Ehere%3C/a%3E""></assign> </if> // condition 2 <if VERSION-409=""A4"" VERSION-425=""A5""> <assign CTA=""purple""></assign> <assign CTA2=""orange""></assign> <assign TEXT1=""Hi%20%3Cspan%20style='font-%20weight:bold;'%3EJohn%3C/span%3E""></assign> </if> // condition 3 <if LANG-618=""en_US""> <assign TITLE=""English""></assign> </if>"; RegexOptions options = RegexOptions.CultureInvariant; Regex regex = new Regex(pattern, options); string result = regex.Replace(input, substitution); } }

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