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

/
/
g

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @""",]"; string substitution = @"""]"; string input = @"[[""USA"",1,2],[""Canada"",0],[""Mexico"",0,4,3],[""Guatemala"",2,4,5,6],[""Belize"",2,3],[""El Salvador"",3,6],[""Honduras"",3,5,7],[""Nicaragua"",6,8],[""San Jose"",7,9],[""Panama"",8,10],[""Columbia"",11,15,17,16],[""Venezuela"",10,15,12],[""Guyana"",11,15,13],[""Suriname"",12,15,14],[""French Guiana"",13,15],[""Brazil"",10,11,12,13,14,17,18,20,21,22],[""Ecuador"",10,17],[""Peru"",16,10,15,18,19],[""Bolivia"",17,15,20,21,19],[""Chile"",17,18,21],[""Paraguay"",18,15,21],[""Argentina"",19,18,20,15,22],[""Uruguay"",21,15],[""The Bahamas"",],[""Cuba"",],[""Jamaica"",],[""Haiti"",27],[""Dominican Republic"",26],[""Puerto Rico"",],[""Saint Kitts and Nevis"",],[""Montserrat"",],[""Guadeloupe"",],[""Dominica"",],[""Martinique"",],[""Saint Vincent"",],[""Barbados"",],[""Trinidad and Tobago"",],[""Greenland"",],[""Azores"",],[""Falkland Islands"",],[""South Georgia"",],[""Cape Verde"",],[""Madeira Island"",],[""Canary Islands"",],[""Faroe Islands"",],[""Republic of Ireland"",46],[""United Kingdom"",45],[""Svalbard"",],[""Norway"",49,50,51],[""Sweden"",48,50],[""Finland"",49,48,51],[""Russia"",48,50,53,54,56,62,84,87,88,89,93,90,91],[""Denmark"",57],[""Estonia"",51,54],[""Latvia"",53,51,56,55],[""Lithuania"",54,56,61],[""Belarus"",55,54,51,62,61],[""Germany"",60,59,58,52,61,63,68,69,71,70],[""Netherlands"",57,59],[""Belgium"",70,58,57,60],[""Luxembourg"",70,59,57],[""Poland"",57,55,56,62,64,63],[""Ukraine"",64,61,56,51,66,65,67],[""Czech Republic"",57,61,64,68],[""Slovakia"",68,63,61,62,67],[""Moldova"",62,66],[""Romania"",67,62,65,76,75],[""Hungary"",68,64,62,66,75,73,72],[""Austria"",69,57,63,64,67,72,80,71],[""Liechtenstein"",71,57,68],[""France"",59,60,57,71,80,81],[""Switzerland"",70,57,69,68,80],[""Slovenia"",80,68,67,73],[""Croatia"",72,67,75,74],[""Bosnia and Herzegovina"",73,75,77],[""Serbia"",74,73,67,66,76,79,78,77],[""Bulgaria"",75,66,84,83,79],[""Montenegro"",74,75,78],[""Albania"",77,75,79,83],[""Macedonia"",78,75,76,83],[""Italy"",70,71,68,72],[""Spain"",82,70],[""Portugal"",81],[""Greece"",78,79,76,84],[""Turkey"",83,51,87,88,97,98,99],[""Malta"",],[""Cyprus"",],[""Armenia"",84,51,88,97],[""Azerbaijan"",84,87,51,97],[""Kazakhstan"",51,93,94,96],[""Mongolia"",93,51],[""North Korea"",93,51,92],[""South Korea"",91],[""China"",95,94,89,51,90,91,120,119,117,111,113,112,110],[""Uzbekistan"",89,93,95,96],[""Afghanistan"",97,96,94,93,110,109],[""Turkmenistan"",89,94,95,97],[""Iran"",98,84,88,87,96,95,109],[""Iraq"",102,99,84,97,104,103],[""Syria"",100,84,98,102,101],[""Lebanon"",101,99],[""Israel"",145,100,99,102],[""Jordan"",101,99,98,103],[""Saudi Arabia"",102,98,104,105,106,107,108],[""Kuwait"",98,103],[""Qatar"",103],[""United Arab Emirates"",103,107],[""Oman"",103,106,108],[""Yemen"",103,107],[""Pakistan"",97,95,110,111],[""Kashmir"",109,95,93,111],[""India"",109,110,112,113,117,114],[""Nepal"",111,93],[""Bhutan"",111,93],[""Bangladesh"",111,117],[""Sri Lanka"",],[""Adaman and Nicobar Islands"",],[""Myanmar"",114,111,93,119,118],[""Thailand"",117,119,121,122],[""Laos"",117,93,120,121,118],[""Vietnam"",119,93,121],[""Cambodia"",118,119,120],[""Malaysia"",118,123,125],[""Brunei"",122],[""Phillipines"",],[""Indonesia"",122,126,127],[""Papua New Guinea"",125],[""Australia"",],[""Tasmania"",],[""Japan"",],[""Guam"",],[""Solomon Islands"",],[""Vanuatu"",],[""Fiji"",],[""New Caledonia"",],[""New Zealand"",],[""Kerguelen Island"",],[""Heard Island"",],[""Mauritius"",],[""Reunion"",],[""Mayotte"",],[""Comoros"",],[""Madagascar"",],[""Sao Tome"",],[""Bioko"",],[""Egypt"",146,101,167],[""Libya"",148,147,145,167,166,164],[""Tunisia"",148,146],[""Algeria"",150,149,147,146,164,159,151],[""Morocco"",150,148],[""Western Sahara"",149,148,151],[""Mauritania"",150,148,159,152],[""Senegal"",153,151,159,155,154],[""The Gambia"",152],[""Guinea-Bissau"",152,155],[""Guinea"",154,152,159,158,157,156],[""Sierra Leone"",155,157],[""Liberia"",156,155,158],[""Cote D'Ivoire"",157,155,159,160,161],[""Mali"",152,151,148,164,160,158,155],[""Burkina Faso"",159,164,163,162,161,158],[""Ghana"",158,160,162],[""Togo"",161,160],[""Benin"",162,160,164,165],[""Niger"",160,159,148,146,166,165,163],[""Nigeria"",163,164,166,176],[""Chad"",164,146,167,175,176,165],[""Sudan"",166,146,145,168,170,172,173,174,175],[""Eritrea"",167,169,170],[""Djibouti"",170,168,171],[""Ethiopia"",167,168,169,171,172],[""Somalia"",172,170,169],[""Kenya"",173,167,170,171,182],[""Uganda"",174,167,172,182,180],[""Democratic Republic of the Congo"",183,179,175,167,173,180,181,185,184],[""Central African Republic"",176,166,167,174,179],[""Cameroon"",165,166,175,179,178,177],[""Equatorial Guinea"",176,178],[""Gabon"",177,176,179],[""Congo"",178,176,175,174,183],[""Rwanda"",174,173,182,181],[""Burundi"",174,180,182],[""Tanzania"",181,180,173,172,187,186,185],[""Cabinda"",179,174],[""Angola"",174,185,190],[""Zambia"",184,174,182,186,187,188,189,190],[""Malawi"",185,182,187],[""Mozambique"",188,185,186,182,191,192],[""Zimbabwe"",190,185,187,191,189],[""Botswana"",190,185,188,191],[""Namibia"",184,185,188,189,191],[""South Africa"",190,189,188,187,192,193],[""Swaziland"",191,187],[""Lesotho"",191]]"; Regex regex = new Regex(pattern); string result = regex.Replace(input, substitution); } }

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