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
Processing...

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"(?<accountKey>\d{10})\,(?<partyKey>\d{10})"; string input = @"ACCOUNT_KEY,PARTY_KEY,ROLE_KEY,CHANGE_BEGIN_DATE,SEGMENT_ID,ROLE_DESC,CHANGE_END_DATE,CHANGE_CURRENT_IND 9000000001,8000001001,1,20010101,AMLKCV,,59990101,Y 9000000002,8000001002,1,20010101,AMLKCV,,59990101,Y 9000000003,8000001003,1,20010101,AMLKCV,,59990101,Y 9000000004,8000001004,1,20010101,AMLKCV,,59990101,Y 9000000005,8000001005,1,20010101,AMLKCV,,59990101,Y 9000000006,8000001006,1,20010101,AMLKCV,,59990101,Y 9000000007,8000001007,1,20010101,AMLKCV,,59990101,Y 9000000008,8000001008,1,20010101,AMLKCV,,59990101,Y 9000000009,8000001009,1,20010101,AMLKCV,,59990101,Y 9000000010,8000001010,1,20010101,AMLKCV,,59990101,Y 9000000011,8000001011,1,20010101,AMLKCV,,59990101,Y 9000000012,8000001012,1,20010101,AMLKCV,,59990101,Y 9000000013,8000001013,1,20010101,AMLKCV,,59990101,Y 9000000014,8000001014,1,20010101,AMLKCV,,59990101,Y 9000000015,8000001015,1,20010101,AMLKCV,,59990101,Y 9000000016,8000001016,1,20010101,AMLKCV,,59990101,Y 9000000017,8000001017,1,20010101,AMLKCV,,59990101,Y 9000000018,8000001018,1,20010101,AMLKCV,,59990101,Y 9000000019,8000001019,1,20010101,AMLKCV,,59990101,Y 9000000020,8000001020,1,20010101,AMLKCV,,59990101,Y 9000000021,8000001021,1,20010101,AMLKCV,,59990101,Y 9000000022,8000001022,1,20010101,AMLKCV,,59990101,Y 9000000023,8000001023,1,20010101,AMLKCV,,59990101,Y 9000000024,8000001024,1,20010101,AMLKCV,,59990101,Y 9000000025,8000001025,1,20010101,AMLKCV,,59990101,Y 9000000026,8000001026,1,20010101,AMLKCV,,59990101,Y 9000000027,8000001027,1,20010101,AMLKCV,,59990101,Y 9000000028,8000001028,1,20010101,AMLKCV,,59990101,Y 9000000029,8000001029,1,20010101,AMLKCV,,59990101,Y 9000000030,8000001030,1,20010101,AMLKCV,,59990101,Y 9000000031,8000001031,1,20010101,AMLKCV,,59990101,Y "; 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