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"
"
g

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"([A-Z0-9-]+)\.txt:NAME:\s\""module\s\w+\s([0-9/]+)\"",\sDESCR:\s\""(.+)\"""; string input = @"RMAGPGE-PGBP01-01.txt:NAME: ""module R0"", DESCR: ""ASR 900 Route Switch Processor 2, Base Scale, 128Gbps"" RMAGPGE-PGIG01-01.txt:NAME: ""module R0"", DESCR: ""ASR 903 Route Switch Processor 1, Base Scale, 55Gbps"" RMAGPGE-PGIG01-01.txt:NAME: ""module R1"", DESCR: ""ASR 903 Route Switch Processor 1, Base Scale, 55Gbps"" RMAGPUI-PLIG01-01.txt:NAME: ""module R0"", DESCR: ""ASR 900 Route Switch Processor 2, Base Scale, 128Gbps"" RMAGPUI-PLIG01-01.txt:NAME: ""module R1"", DESCR: ""ASR 900 Route Switch Processor 2, Base Scale, 128Gbps"" RMAGPUI-PLMD00-01.txt:NAME: ""module R0"", DESCR: ""ASR 900 Route Switch Processor 2, Base Scale, 128Gbps"" RMAGPUI-PLMD00-01.txt:NAME: ""module R1"", DESCR: ""ASR 900 Route Switch Processor 2, Base Scale, 128Gbps"" RMAGPUI-PLMI00-01.txt:NAME: ""module R0"", DESCR: ""ASR 900 Route Switch Processor 2, Base Scale, 128Gbps"" RMAGPUI-PLMI00-01.txt:NAME: ""module R1"", DESCR: ""ASR 900 Route Switch Processor 2, Base Scale, 128Gbps"" RMAGRJO-CGD01-01.txt:NAME: ""module 0/RSP0/CPU0"", DESCR: ""ASR9K Route Switch Processor with 440G/slot Fabric and 12GB"" RMAGRJO-CGD01-01.txt:NAME: ""module 0/RSP1/CPU0"", DESCR: ""ASR9K Route Switch Processor with 440G/slot Fabric and 12GB"" RMAGRJO-CGD01-01.txt:NAME: ""module 0/0/CPU0"", DESCR: ""160G Modular Linecard, Service Edge Optimized"" RMAGRJO-CGD01-01.txt:NAME: ""module 0/0/0"", DESCR: ""ASR 9000 8-port 10GE Modular Port Adapter"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/0/0/0"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/0/0/1"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/0/0/2"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/0/0/3"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/0/0/4"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/0/0/5"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/0/0/6"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/0/0/7"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-CGD01-01.txt:NAME: ""module 0/0/1"", DESCR: ""ASR 9000 8-port 10GE Modular Port Adapter"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/0/1/2"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/0/1/3"", DESCR: ""10GBASE-ZR SFP+, SMF 80km"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/0/1/4"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/0/1/5"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/0/1/6"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/0/1/7"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-CGD01-01.txt:NAME: ""module 0/1/CPU0"", DESCR: ""160G Modular Linecard, Service Edge Optimized"" RMAGRJO-CGD01-01.txt:NAME: ""module 0/1/0"", DESCR: ""ASR 9000 8-port 10GE Modular Port Adapter"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/1/0/0"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/1/0/1"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/1/0/2"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/1/0/3"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/1/0/4"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/1/0/5"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/1/0/6"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/1/0/7"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-CGD01-01.txt:NAME: ""module 0/1/1"", DESCR: ""ASR 9000 8-port 10GE Modular Port Adapter"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/1/1/2"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/1/1/3"", DESCR: ""10GBASE-ZR SFP+, SMF 80km"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/1/1/4"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/1/1/5"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/1/1/6"", DESCR: ""10GBASE-ZR SFP+, SMF 80km"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/1/1/7"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-CGD01-01.txt:NAME: ""module 0/2/CPU0"", DESCR: ""160G Modular Linecard, Service Edge Optimized"" RMAGRJO-CGD01-01.txt:NAME: ""module 0/2/0"", DESCR: ""ASR 9000 8-port 10GE Modular Port Adapter"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/2/0/0"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/2/0/1"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/2/0/2"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/2/0/3"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/2/0/4"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/2/0/5"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/2/0/6"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/2/0/7"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module 0/3/CPU0"", DESCR: ""160G Modular Linecard, Service Edge Optimized"" RMAGRJO-CGD01-01.txt:NAME: ""module 0/3/0"", DESCR: ""ASR 9000 8-port 10GE Modular Port Adapter"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/3/0/0"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/3/0/1"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/3/0/2"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/3/0/3"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/3/0/4"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/3/0/5"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/3/0/6"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-CGD01-01.txt:NAME: ""module mau 0/3/0/7"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-GDL01-01.txt:NAME: ""module 0/RSP0/CPU0"", DESCR: ""ASR9K Route Switch Processor with 440G/slot Fabric and 12GB"" RMAGRJO-GDL01-01.txt:NAME: ""module 0/RSP1/CPU0"", DESCR: ""ASR9K Route Switch Processor with 440G/slot Fabric and 12GB"" RMAGRJO-GDL01-01.txt:NAME: ""module 0/0/CPU0"", DESCR: ""160G Modular Linecard, Service Edge Optimized"" RMAGRJO-GDL01-01.txt:NAME: ""module 0/0/0"", DESCR: ""ASR 9000 8-port 10GE Modular Port Adapter"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/0/0/0"", DESCR: ""10GBASE-ZR SFP+, SMF 80km"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/0/0/1"", DESCR: ""10GBASE-ZR SFP+, SMF 80km"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/0/0/2"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/0/0/3"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/0/0/4"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/0/0/5"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/0/0/6"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/0/0/7"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-GDL01-01.txt:NAME: ""module 0/0/1"", DESCR: ""ASR 9000 8-port 10GE Modular Port Adapter"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/0/1/0"", DESCR: ""10GBASE-ZR SFP+, SMF 80km"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/0/1/1"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/0/1/2"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/0/1/3"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/0/1/4"", DESCR: ""10GBASE-ZR SFP+, SMF 80km"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/0/1/5"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/0/1/6"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/0/1/7"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-GDL01-01.txt:NAME: ""module 0/1/CPU0"", DESCR: ""160G Modular Linecard, Service Edge Optimized"" RMAGRJO-GDL01-01.txt:NAME: ""module 0/1/0"", DESCR: ""ASR 9000 8-port 10GE Modular Port Adapter"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/1/0/0"", DESCR: ""10GBASE-ZR SFP+, SMF 80km"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/1/0/1"", DESCR: ""10GBASE-ZR SFP+, SMF 80km"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/1/0/2"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/1/0/3"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/1/0/4"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/1/0/5"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/1/0/6"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/1/0/7"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-GDL01-01.txt:NAME: ""module 0/1/1"", DESCR: ""ASR 9000 8-port 10GE Modular Port Adapter"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/1/1/0"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/1/1/1"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/1/1/2"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/1/1/3"", DESCR: ""10GBASE-ZR SFP+, SMF 80km"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/1/1/4"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/1/1/5"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/1/1/6"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-GDL01-01.txt:NAME: ""module mau 0/1/1/7"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-MRT01-01.txt:NAME: ""module 0/RSP0/CPU0"", DESCR: ""ASR9K Route Switch Processor with 440G/slot Fabric and 12GB"" RMAGRJO-MRT01-01.txt:NAME: ""module 0/RSP1/CPU0"", DESCR: ""ASR9K Route Switch Processor with 440G/slot Fabric and 12GB"" RMAGRJO-MRT01-01.txt:NAME: ""module 0/0/CPU0"", DESCR: ""160G Modular Linecard, Service Edge Optimized"" RMAGRJO-MRT01-01.txt:NAME: ""module 0/0/0"", DESCR: ""ASR 9000 8-port 10GE Modular Port Adapter"" RMAGRJO-MRT01-01.txt:NAME: ""module mau 0/0/0/0"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-MRT01-01.txt:NAME: ""module mau 0/0/0/1"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-MRT01-01.txt:NAME: ""module mau 0/0/0/2"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-MRT01-01.txt:NAME: ""module mau 0/0/0/3"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-MRT01-01.txt:NAME: ""module mau 0/0/0/4"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-MRT01-01.txt:NAME: ""module mau 0/0/0/5"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-MRT01-01.txt:NAME: ""module mau 0/0/0/6"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-MRT01-01.txt:NAME: ""module mau 0/0/0/7"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-MRT01-01.txt:NAME: ""module 0/0/1"", DESCR: ""ASR 9000 8-port 10GE Modular Port Adapter"" RMAGRJO-MRT01-01.txt:NAME: ""module mau 0/0/1/0"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-MRT01-01.txt:NAME: ""module mau 0/0/1/2"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-MRT01-01.txt:NAME: ""module mau 0/0/1/3"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-MRT01-01.txt:NAME: ""module mau 0/0/1/4"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-MRT01-01.txt:NAME: ""module mau 0/0/1/5"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-MRT01-01.txt:NAME: ""module mau 0/0/1/6"", DESCR: ""10GBASE-ER 1550nm SMF 40KM"" RMAGRJO-MRT01-01.txt:NAME: ""module mau 0/0/1/7"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" RMAGRJO-MRT01-01.txt:NAME: ""module 0/1/CPU0"", DESCR: ""160G Modular Linecard, Service Edge Optimized"" RMAGRJO-MRT01-01.txt:NAME: ""module 0/1/0"", DESCR: ""ASR 9000 8-port 10GE Modular Port Adapter"" RMAGRJO-MRT01-01.txt:NAME: ""module mau 0/1/0/0"", DESCR: ""10GBASE-LR SFP+ Module for SMF"" "; foreach (Match m in Regex.Matches(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