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"
"
gmx

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"^ # Start of string (?: # A container group: (\+49|0049|\+\(49\)|\(\+49\))? [ ()\/-]* # German: country code (?(1)|0)1(?:5[12579]|6[023489]|7[0-9]) # trunk prefix and company code | # or (\+43|0043|\+\(43\)|\(\+43\))? [ ()\/-]* # Austrian: country code (?(2)|0)6(?:64|(?:50|6[0457]|7[0678]|8[0168]|9[09])) # trunk prefix and company code ) [ ()\/-]* # zero or more spaces, parens, / and - \d(?:[ \/-]*\d){6,7} # a digit and then six or seven occurrences of space, / or - and a digit \s* # zero or more whites $ # end of string"; string input = @"################################### This is allowed ########################## #### Longes German format ### https://en.wikipedia.org/wiki/Telephone_numbers_in_Germany 017698600189 0176 98600189 0176 98 600 189 +4917698600189 +49 17698600189 0049 17698600189 004917698600189 (+49)17698600189 (+49) 17698600189 +(49)17698600189 +(49) 17698600189 +(49) 176 98600189 +(49) 176 98 600 189 +49 176 98 600 189 +49 (176) 98 600 189 #### Shortest German format ### https://en.wikipedia.org/wiki/Telephone_numbers_in_Germany 01609860018 0160 9860018 0160 98 600 18 +491609860018 +49 1609860018 0049 1609860018 00491609860018 (+49)1609860018 (+49) 1609860018 +(49)1609860018 +(49) 1609860018 +(49) 160 9860018 +(49) 160 98 600 18 +49 160 98 600 18 +49 (160) 98 600 18 #### Different Prefix https://en.wikipedia.org/wiki/Telephone_numbers_in_Germany 017698600189 01609860018 01519860018 01709860018 01719860018 01759860018 01529860018 01799860018 01789860018 01779860018 01559860018 01629860018 01729860018 01739860018 01749860018 ### Austrian numbers in different possible formats: https://www.tarife.at/ratgeber/vorwahl-handynetze 06641234567 066412345678 +436641234567 +4366412345678 0664 1234567 0664 12345678 0664 123 456 7 0664 123 456 78 0664 123 4567 0664 123 45678 +43 664 1234567 +43 664 12345678 +43 6641234567 +43 66412345678 +43 664 123 4567 +43 664 123 45678 +43 664 123 456 7 +43 664 123 456 78 (+43) 664 123 456 7 (+43) 664 123 456 78 +(43) 664 123 456 7 +(43) 664 123 456 78 ### Austrian numbers with same format but different prefix 06801234567 068012345678 06881234567 068812345678 06811234567 068112345678 06991234567 069912345678 06641234567 066412345678 06811234567 068112345678 06671234567 066712345678 06501234567 065012345678 06761234567 067612345678 06501234567 065012345678 06781234567 067812345678 06771234567 067712345678 06901234567 069012345678 06651234567 066512345678 06861234567 068612345678 ############################################################################################ ############################################################################################ ################################### This is NOT valid ###################################### 012345678901234 123w345345345345 0123456789101191919 ### Too short 0160986001 016098600 01609860 0160986 016098 01609 0160 016 01 0 ### Too short with +49 (same is true with +43) +490160986001 +49016098600 +4901609860 +490160986 +49016098 +4901609 +490160 +49016 +4901 +490 ### Too short with 0049 (same is true with 0043) 00490160986001 0049016098600 004901609860 00490160986 0049016098 004901609 00490160 0049016 004901 00490 ### Too long for Germany 0176123456789 01761234567891 017612345678912 0176123456789123 01761234567891234 017612345678912345 0176123456789123456 +49176123456789 +491761234567891 +4917612345678912 +49176123456789123 +491761234567891234 +4917612345678912345 +49176123456789123456 0049176123456789 00491761234567891 004917612345678912 0049176123456789123 00491761234567891234 004917612345678912345 0049176123456789123456 ### Not German and not Austrain format for mobile numbers +12127319863 +13322014056 +12126712234 +427532697710 +417868150810 +287533002875 "; RegexOptions options = RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace; 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