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

r"
"
gm

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"^DATE:.*((?:\n(?!AREA:).*)+)"; string input = @"AREA: OMBEYI MARKET, ST. RITA RAMULA DATE: Thursday 25.03.2021, TIME: 9.00 A.M. = 5.00 P.M. Ombeyi Mk, Kiliti Mkt, Masogo Mkt, Miwani, Kasongo, Onyango Midika, St. Rita Ramula, Onyalo Biro, Yawo Pri, Obino, Rutek, Keyo Pri & adjacent customers. AREA: NYAMACHE FACTORY DATE: Thursday 25.03.2021, TIME: 830 A.M. - 3.00 P.M. Nyamache Fact, Suguta, Gionseri, Igare, Kionduso, Nyationgongo, Enchoro, Kebuko, Emenwa, Maji Mazuri, Borangi & adjacent customers. AREA: SUNEKA MARKET, RIANA MARKET DATE: Thursday 25.03.2021, TIME: 8.00 A.M. - 3.00 P.M. Suneka Mk, Riana Mk, Kiabusura, Gesonso, Chisaro, Sugunana, Nyamira Ndogo & adjacent customers. AREA: ITIATI, GITUNDUTI DATE: Thursday 25.03.2021, TIME: 9.00 A.M. = 2.00 P.M. General China, Gachuiro, Gathuini Pri, Itiati Campus, Kianjugum, Gikore, Kihuri TBC, Gitunduti & adjacent customers."; 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