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

/
/
gm

Test String

Code Generator

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"<text[^>]+>([^<]+)<\/text>"; string input = @"This XML file does not appear to have any style information associated with it. The document tree is shown below. <transcript> <text start=""9.462"" dur=""1.123"">Aaaah</text> <text start=""10.585"" dur=""1.646"">It&#39;s Rewind time.</text> <text start=""12.341"" dur=""3.721"">If I controlled Rewind I would want</text> <text start=""16.062"" dur=""3.161"">Fortnite and Marques Brownlee.</text> <text start=""24.834"" dur=""1.014"">Is this what you wanted?</text> <text start=""25.848"" dur=""1.887"">You know who I would have asked for?</text> <text start=""27.944"" dur=""1.557"">Quit horsing around.</text> <text start=""30.239"" dur=""2.217"">Play me some of that jumping music.</text> <text start=""32.676"" dur=""1.336"">Did you say jumping music?</text> <text start=""34.072"" dur=""1.266"">Jumping music?</text> <text start=""39.622"" dur=""1.28"">Everybody! Off!</text> <text start=""48.192"" dur=""1.847"">Not even a thank you?!</text> <text start=""57.676"" dur=""1.762"">Is that Marques?</text> <text start=""59.438"" dur=""1.597"">I want Liza!</text> <text start=""64.405"" dur=""3.644"">Yeaaaaaahhhh!!!!</text> <text start=""70.507"" dur=""5.51"">So guys, apparently we control Rewind this year.</text> <text start=""76.017"" dur=""4.842""> Y&#39;all we can do whatever we want. What do we do? </text> <text start=""85.011"" dur=""3.299"">There&#39;s one thing this video needs.</text> <text start=""88.31"" dur=""1.989"">K-pop!</text> <text start=""108.973"" dur=""2.159"">Can I have a Royal Wedding?</text> <text start=""111.132"" dur=""1.73"">Yeah, but you&#39;re marrying Bongo Cat.</text> <text start=""112.863"" dur=""1"">Wait, what?</text> <text start=""122.334"" dur=""1.587"">Rewind needs more science.</text> <text start=""123.921"" dur=""1.473"">Can we do an experiment?</text> <text start=""125.758"" dur=""2.359"">I love that. Melting lipstick.</text> <text start=""133.23"" dur=""1.332"">I want to eat something.</text> <text start=""135.102"" dur=""1.743"">Mukbang!</text> <text start=""136.845"" dur=""1.98"">Yes, let&#39;s do it in Korea!</text> <text start=""145.191"" dur=""1.307"">Gallop, what do you want?</text> <text start=""154.964"" dur=""2.042"">Marshmello needs to be in this video.</text> <text start=""158.036"" dur=""1.298"">Who is Marshmello?</text> <text start=""159.675"" dur=""1.835"">How about yodeling kid?</text> <text start=""162.104"" dur=""1.29"">With Adam Rippon!</text> <text start=""182.612"" dur=""2.332"">Guys, let&#39;s do the In My Feelings challenge.</text> <text start=""184.944"" dur=""1.014"">Right!</text> <text start=""188.239"" dur=""1.193"">I love this song!</text> <text start=""189.432"" dur=""1.68"">Let&#39;s hear the remix!</text> <text start=""222.998"" dur=""2.064"">Wait, wait, wait. Hold on, hold on.</text> <text start=""225.062"" dur=""3.274""> You know who really needs to be in this Rewind video? </text> <text start=""228.336"" dur=""3.062""> Everyone who managed to do something bigger than themselves this year. </text> <text start=""231.398"" dur=""3.266""> Found a way to help the causes that matter to them most. </text> <text start=""234.664"" dur=""3.423""> To everyone who proved it&#39;s ok to talk about mental health this year. </text> <text start=""238.087"" dur=""3.443""> Showing our viewers that it&#39;s ok to go through tough times like that. </text> <text start=""241.53"" dur=""4.122""> It takes a lot of bravery to be that vulnerable and I&#39;m so proud of this community. </text> <text start=""245.652"" dur=""4.046""> I think this year&#39;s Rewind should celebrate the fierce, fabulous </text> <text start=""249.698"" dur=""1.893"">and empowering art of drag.</text> <text start=""251.591"" dur=""3.027""> I want to see all of you be your own kind of beautiful. </text> <text start=""254.618"" dur=""3.121""> And to those people who have raised money in the field of education. </text> <text start=""257.739"" dur=""4.628""> Can we also give a moment to Asian representation in entertainment this year? </text> <text start=""262.367"" dur=""1.393"">Major strides were made.</text> <text start=""263.76"" dur=""2.018""> And to the people who put aside their differences. </text> <text start=""265.778"" dur=""1.837"">Yeah, and created something really special.</text> <text start=""267.615"" dur=""3.769""> Here&#39;s to all women in 2018 for finding their voices. </text> <text start=""271.384"" dur=""3.614""> It&#39;s nice seeing how women grew and were empowered. </text> <text start=""274.998"" dur=""2.778""> Can we give a moment to working moms? Let&#39;s do it! </text> <text start=""277.776"" dur=""4.5""> To everyone who taught, or learned, something new this year. </text> <text start=""282.276"" dur=""3.061""> And to all the refugees and anyone looking for a home. </text> <text start=""285.337"" dur=""4.201""> All of us should send a toast to the kids who follow their dreams. </text> <text start=""289.538"" dur=""4.888""> I want to thank the whole community that always supports during our best and worst. </text> <text start=""294.426"" dur=""2.262"">We are a family, we are a team.</text> <text start=""296.688"" dur=""1.772"">Family is everything.</text> <text start=""298.46"" dur=""3.764""> I want to give a moment to everyone who supported me when I got sick. </text> <text start=""302.224"" dur=""4.087""> All of the comments and messages I got made me feel like I wasn&#39;t alone. </text> <text start=""307.222"" dur=""2.177"">We&#39;re forgetting something.</text> <text start=""311.312"" dur=""3.11"">I think we should read the comments.</text> <text start=""322.401"" dur=""4.34""> Yeah I have a feeling this is going to get a little bit crazy. </text> <text start=""326.741"" dur=""2.77"">Let&#39;s give the people what they want.</text> <text start=""413.038"" dur=""1.51"">Aaaahhh</text> <text start=""417.803"" dur=""2.29"">That&#39;s hot, that&#39;s hot.</text> </transcript>"; 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