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

/
/

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"Total statistics:\s+\K\d+"; string input = @"{""logSystem"":[[2019,4,26,10,37,0,44872,""Battery Charge Started! 17.0°C 21.05Volt"",""#000099"",""normal""],[2019,4,26,10,37,0,44871,""Total statistics: 334418m, 23862min, blade on time: 21289min"",""#2E2EFE"",""bold""],[2019,4,26,10,37,0,44870,""Current cut statistics: 2m, 0min, blade on time: 0min"",""#2E2EFE"",""bold""],[2019,4,26,10,37,0,44869,""Landroid at home"",""#996600"",""normal""],[2019,4,26,10,37,0,44868,""Landroid searching home"",""#996600"",""normal""],[2019,4,26,10,36,46,44867,""Landroid following wire"",""#996600"",""normal""],[2019,4,26,10,36,43,44866,""Landroid searching wire"",""#996600"",""normal""],[2019,4,26,10,36,41,44865,""[auto] message reset Close windows to go charge"",""#FFA800"",""normal""],[2019,4,26,10,36,40,44864,""Landroid start sequence"",""#996600"",""normal""],[2019,4,26,10,36,40,44863,""Home button pressed"",""#FFA800"",""normal""],[2019,4,26,10,36,38,44862,""[user] message reset Upside Down"",""#FFA800"",""normal""],[2019,4,26,10,34,47,44861,""Landroid Upside Down 41x-2y-0.6z"",""#FF0000"",""bold""],[2019,4,26,10,34,42,44860,""[user] message reset Trapped"",""#FFA800"",""normal""],[2019,4,26,10,34,35,44859,""[auto] message reset Outside working area"",""#FFA800"",""normal""],[2019,4,26,10,29,20,44858,""Landroid in idle state 16.4°C 20.33 Volt"",""#996600"",""normal""],[2019,4,26,10,29,20,44857,""Total statistics: 334416m, 23862min, blade on time: 21289min"",""#2E2EFE"",""bold""],[2019,4,26,10,29,20,44856,""Current cut statistics: 71m, 8min, blade on time: 0min"",""#2E2EFE"",""bold""],[2019,4,26,10,29,20,44855,""!ERROR! outside wire timeout"",""#FF0000"",""bold""],[2019,4,26,10,28,54,44854,""[Wifi] Connected"",""#2E2EFE"",""normal""],[2019,4,26,10,28,36,44853,""[Wifi] Connection Lost!"",""#2E2EFE"",""normal""],[2019,4,26,10,25,6,44852,""Landroid following wire"",""#996600"",""normal""],[2019,4,26,10,25,4,44851,""Landroid searching home"",""#996600"",""normal""],[2019,4,26,10,24,54,44850,""Landroid following wire"",""#996600"",""normal""],[2019,4,26,10,24,54,44849,""Landroid searching home"",""#996600"",""normal""],[2019,4,26,10,24,28,44848,""Landroid following wire"",""#996600"",""normal""],[2019,4,26,10,24,25,44847,""Landroid searching wire"",""#996600"",""normal""],[2019,4,26,10,23,42,44846,""Landroid following wire"",""#996600"",""normal""],[2019,4,26,10,23,39,44845,""Landroid searching wire"",""#996600"",""normal""],[2019,4,26,10,22,58,44844,""Landroid following wire"",""#996600"",""normal""],[2019,4,26,10,22,54,44843,""Landroid searching wire"",""#996600"",""normal""],[2019,4,26,10,22,54,44842,""Flowerbed loop detected leaving..."",""#FFA800"",""normal""],[2019,4,26,10,21,36,44841,""Landroid following wire"",""#996600"",""normal""],[2019,4,26,10,21,22,44840,""Landroid searching wire"",""#996600"",""normal""],[2019,4,26,10,21,22,44839,""[Battery LOW] homing req, status: 14.8°C 23.65Volt"",""#FFA800"",""normal""],[2019,4,26,10,21,13,44838,""Landroid grass cutting"",""#996600"",""normal""],[2019,4,26,10,21,10,44837,""[auto] message reset Close windows to start"",""#FFA800"",""normal""],[2019,4,26,10,21,9,44836,""Landroid start sequence"",""#996600"",""normal""],[2019,4,26,10,21,9,44835,""Start button pressed"",""#FFA800"",""normal""],[2019,4,26,10,21,7,44834,""[user] message reset Trapped"",""#FFA800"",""normal""],[2019,4,26,10,21,3,44833,""[Wifi] Connected"",""#2E2EFE"",""normal""],[2019,4,26,10,20,51,44832,""Landroid in idle state 14.7°C 24.20 Volt"",""#996600"",""normal""],[2019,4,26,10,20,51,44831,""Power On v: 2.45"",""#000000"",""bold""],[2019,4,25,19,36,18,44830,""Shutdown 24.07Volt"",""#000000"",""bold""],[2019,4,25,19,36,18,44829,""Landroid idle shutdown timer"",""#FFA800"",""normal""],[2019,4,25,19,16,18,44828,""Landroid in idle state 37.6°C 24.05 Volt"",""#996600"",""normal""],[2019,4,25,19,16,18,44827,""Total statistics: 334345m, 23854min, blade on time: 21289min"",""#2E2EFE"",""bold""],[2019,4,25,19,16,18,44826,""Current cut statistics: 1087m, 76min, blade on time: 76min"",""#2E2EFE"",""bold""],[2019,4,25,19,16,17,44825,""Landroid following wire"",""#996600"",""normal""],[2019,4,25,19,16,15,44824,""Landroid searching home"",""#996600"",""normal""],[2019,4,25,19,16,9,44823,""Landroid following wire"",""#996600"",""normal""],[2019,4,25,19,16,9,44822,""Landroid searching home"",""#996600"",""normal""],[2019,4,25,19,16,5,44821,""Landroid following wire"",""#996600"",""normal""],[2019,4,25,19,15,58,44820,""Landroid lift recovery procedure"",""#996600"",""normal""],[2019,4,25,19,15,57,44819,""Landroid following wire"",""#996600"",""normal""],[2019,4,25,19,15,55,44818,""Landroid searching home"",""#996600"",""normal""],[2019,4,25,19,15,50,44817,""Landroid following wire"",""#996600"",""normal""],[2019,4,25,19,15,50,44816,""Landroid searching wire"",""#996600"",""normal""],[2019,4,25,19,15,50,44815,""[Battery LOW] homing req, status: 37.6°C 23.97Volt"",""#FFA800"",""normal""],[2019,4,25,19,15,28,44814,""Landroid grass cutting"",""#996600"",""normal""],[2019,4,25,19,15,24,44813,""Landroid trapped recovery procedure"",""#996600"",""normal""],[2019,4,25,19,12,26,44812,""Landroid grass cutting"",""#996600"",""normal""],[2019,4,25,19,12,19,44811,""Landroid trapped recovery procedure"",""#996600"",""normal""],[2019,4,25,19,10,49,44810,""Landroid grass cutting"",""#996600"",""normal""],[2019,4,25,19,10,44,44809,""Landroid trapped recovery procedure"",""#996600"",""normal""],[2019,4,25,19,9,22,44808,""Landroid grass cutting"",""#996600"",""normal""],[2019,4,25,19,9,18,44807,""Landroid trapped recovery procedure"",""#996600"",""normal""],[2019,4,25,19,8,32,44806,""Landroid grass cutting"",""#996600"",""normal""],[2019,4,25,19,8,27,44805,""Landroid trapped recovery procedure"",""#996600"",""normal""],[2019,4,25,19,8,26,44804,""Landroid grass cutting"",""#996600"",""normal""],[2019,4,25,19,8,22,44803,""Landroid trapped recovery procedure"",""#996600"",""normal""],[2019,4,25,19,7,55,44802,""Landroid grass cutting"",""#996600"",""normal""],[2019,4,25,19,7,51,44801,""Landroid trapped recovery procedure"",""#996600"",""normal""],[2019,4,25,19,6,0,44800,""Landroid grass cutting"",""#996600"",""normal""],[2019,4,25,19,5,55,44799,""Landroid trapped recovery procedure"",""#996600"",""normal""],[2019,4,25,19,5,6,44798,""Landroid grass cutting"",""#996600"",""normal""],[2019,4,25,19,5,2,44797,""Landroid trapped recovery procedure"",""#996600"",""normal""],[2019,4,25,19,4,10,44796,""Landroid grass cutting"",""#996600"",""normal""],[2019,4,25,19,4,5,44795,""Landroid trapped recovery procedure"",""#996600"",""normal""],[2019,4,25,19,3,29,44794,""Landroid grass cutting"",""#996600"",""normal""],[2019,4,25,19,3,25,44793,""Landroid trapped recovery procedure"",""#996600"",""normal""],[2019,4,25,19,3,25,44792,""Landroid grass cutting"",""#996600"",""normal""],[2019,4,25,19,3,21,44791,""Landroid trapped recovery procedure"",""#996600"",""normal""],[2019,4,25,19,2,58,44790,""Landroid grass cutting"",""#996600"",""normal""],[2019,4,25,19,2,54,44789,""Landroid trapped recovery procedure"",""#996600"",""normal""],[2019,4,25,19,2,52,44788,""Landroid grass cutting"",""#996600"",""normal""],[2019,4,25,19,2,47,44787,""Landroid trapped recovery procedure"",""#996600"",""normal""],[2019,4,25,19,2,43,44786,""Landroid grass cutting"",""#996600"",""normal""],[2019,4,25,19,2,39,44785,""Landroid trapped recovery procedure"",""#996600"",""normal""],[2019,4,25,19,2,23,44784,""Landroid grass cutting"",""#996600"",""normal""],[2019,4,25,19,2,18,44783,""Landroid trapped recovery procedure"",""#996600"",""normal""],[2019,4,25,19,2,6,44782,""Landroid grass cutting"",""#996600"",""normal""],[2019,4,25,19,2,2,44781,""Landroid trapped recovery procedure"",""#996600"",""normal""],[2019,4,25,19,1,0,44780,""Landroid grass cutting"",""#996600"",""normal""],[2019,4,25,19,0,54,44779,""Landroid trapped recovery procedure"",""#996600"",""normal""],[2019,4,25,19,0,54,44778,""Landroid grass cutting"",""#996600"",""normal""],[2019,4,25,19,0,48,44777,""Landroid trapped recovery procedure"",""#996600"",""normal""],[2019,4,25,19,0,46,44776,""Landroid grass cutting"",""#996600"",""normal""],[2019,4,25,19,0,42,44775,""Landroid trapped recovery procedure"",""#996600"",""normal""],[2019,4,25,18,59,21,44774,""Landroid grass cutting"",""#996600"",""normal""],[2019,4,25,18,59,17,44773,""Landroid trapped recovery procedure"",""#996600"",""normal""]]}"; Match m = Regex.Match(input, pattern); 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