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 = @"^(?P<mounting_type>Z)(?P<number_of_function>2)(?P<unit_type>S)(?P<unit_size>10)(?P<function_in_port>A|B|-)(?P<cracking_pressure>1|2|3|4)(?P<sep_1>-)(?P<unit_series>3X)(?P<sep_2>/|=)(?P<surface_coating>J3|)(?P<seal_material>V|)(?P<control_volume_flow>XY|)(?P<type_of_limit_switch>QM|)(?P<monitored_limit_switch_position>A|B|AB|)(?P<power_supply_of_limit_switch>G24|)(?P<special_version>SO40|SO60|SO150|)(?P<additional_details>(.|[0-9])*)$"; string input = @"Z2S10B1-3X/SO40 Z2S10-1-3X/ Z2S10A1-3X/ Z2S10B1-3X/ Z2S10-1-3X/V Z2S10A1-3X/V Z2S10B1-3X/V Z2S10-4-3X/ Z2S10-2-3X/ Z2S10B2-3X/V Z2S10-1-3X/SO14 Z2S10-3-3X/ Z2S10A2-3X/ Z2S10A3-3X/SO40 Z2S10B3-3X/SO40 Z2S10-1-3X/VXY Z2S10B2-3X/ Z2S10B3-3X/ Z2S10-2-3X/V Z2S10A2-3X/V Z2S10A3-3X/ Z2S10A2-3X/SO40 Z2S10A4-3X/SO40 Z2S10B3-3X/V Z2S10A1-3X/SO60 Z2S10B4-3X/ Z2S10-3-3X/V Z2S10A1-3X/SO40 Z2S10A3-3X/VSO40 Z2S10B2-3X/SO60 Z2S10B2-3X/SO40 Z2S10A3-3X/V Z2S10B1-3X/SO60 Z2S10A2-3X/SO60 Z2S10-4-3X/V Z2S10A1-3X/VSO40 Z2S10A4-3X/ Z2S10B4-3X/V Z2S10A1-3X/SO64 Z2S10B1-3X/VSO40 Z2S10A4-3X/V Z2S10-1-3X= Z2S10B1-3X= Z2S10-1-3X/SO73 Z2S10A1-3X/SO73 Z2S10A1-3X/VSO60 Z2S10A4-3X/SO60 Z2S10B1-3X/VSO64 Z2S10B1-3X/VSO60 Z2S10B1-3X/SO64 Z2S10A3-3X/SO60 Z2S10-1-3X/VSO150 Z2S10-3-3X/VSO150 Z2S10A2-3X/VSO40 Z2S10-4-3X/SO150 Z2S10B2-3X/VSO60 Z2S10A2-3X/VSO60 Z2S10-2-3X/VSO150 Z2S10A3-3X/QMAG24 Z2S10B3-3X/QMBG24 Z2S10B1-3X/V/XY Z2S10A4-3X=J3 Z2S10-1-3X/J3 Z2S10A1-3X/J3 Z2S10-2-3X/VJ3 Z2S10-4-3X/VSO150 Z2S10-1-3X/XY Z2S10-1-3X=V Z2S10-2-3X/MT Z2S10B3-3X/SO60 Z2S10-1-3X/SO150 Z2S10A1-3X/XYSO40 Z2S10B1-3X/VXYSO40 Z2S10-3-3X/QMABG24 Z2S10-1-3X/J3V Z2S10-4-3X=J3 Z2S10B1-3X/SO73 Z2S10-2-3X/SO73 Z2S10-2-3X/SO150 Z2S10B2-3X/XY "; 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