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

/
/
gm

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"\[""(Total|Group1|Group2)"",(\d+),\d*,,,,,\d+,\d+\]"; string input = @"<!DOCTYPE html> <html class=""main""> <head> <meta http-equiv=""content-type"" content=""text/html; charset=utf-8"" /> <title>Test_Results_20240621_0910</title> <script type=""text/javascript"" src=""Test_Results_20240621_0910/js/jquery-1.3.2.min.js""></script> <script type=""text/javascript"" src=""Test_Results_20240621_0910/js/jquery.ui.custom-1.8.7.min.js""></script> <script type=""text/javascript"" src=""Test_Results_20240621_0910/js/jquery.dynatree-1.2.4.min.js""></script> <script type=""text/javascript"" src=""Test_Results_20240621_0910/js/jquery.cookie-1.3.1.min.js""></script> <script type=""text/javascript"" src=""Test_Results_20240621_0910/js/jquery.splitter-1.5.1.min.js""></script> <script type=""text/javascript"" src=""Test_Results_20240621_0910/js/dotcover.report.js""></script> <link rel=""stylesheet"" type=""text/css"" href=""Test_Results_20240621_0910/css/dotcover.report.css""> <link rel=""stylesheet"" type=""text/css"" href=""Test_Results_20240621_0910/css/dotcover.report.gen.css""> <link rel=""stylesheet"" type=""text/css"" href=""Test_Results_20240621_0910/css/jquery.dynatree.css""> </head> <body> <div class=""header""><span class=""title"">Test_Results_20240621_0910 Coverage Report</span><span class=""info"">Generated: Friday, June 21, 2024 09:14:13</span></div> <div class=""content"" id=""content""><div id=""coverageTree""></div><iframe id=""sourceCode""></iframe></div> <div class=""footer"">JetBrains dotCover 2024.1.3 Copyright &copy; 2010-2024 <a href=""https://www.jetbrains.com/dotcover/"" target=""_blank"">Product Homepage</a> | <a href=""https://www.jetbrains.com/feedback/feedback.jsp?product=dotCover&build=3&timezone=Eastern Standard Time"" target=""_blank"">Feedback</a> | <a href=""https://www.jetbrains.com/"" target=""_blank"">Company</a></div> <script type=""text/javascript""> var resourceFolder = ""Test_Results_20240621_0910""; var blockSize = 50000; block0 = [[""Total"",47,,,,,,1,2],[""Group1"",29,0,,,,,3,5],[""Group2"",52,0,,,,,8,4]]; coverageData = [block0]; </script> </body> </html>"; RegexOptions options = RegexOptions.Multiline; foreach (Match m in Regex.Matches(input, pattern, options)) { 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