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

/
/
gm

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"var\s(\w+)\s?\=\s?(\d+|\""[^\n""]*\""|\'[^\n']*\')\s?\;"; string input = @"<html> <head>~~</head> <body> <div>contents</div> <script> var value1 = 55;var value2= 27; var value3 = 'T';var value4 = ""FIT#$%SIZE""; var value5 = '{\""P00000WJ000E\"":{\""stock_price\"":\""0.00\"",\""use_stock\"":true,\""use_soldout\"":\""T\"",\""is_display\"":\""T\"",\""is_selling\"":\""T\"",\""option_price\"":79000,\""option_name\"":\""FIT#$%SIZE\"",\""option_value\"":\""NOBLE-44\"",\""stock_number\"":26,\""option_value_orginal\"":[\""NOBLE\"",\""44\""],\""use_stock_original\"":\""T\"",\""use_soldout_original\"":\""T\"",\""use_soldout_today_delivery\"":\""F\"",\""is_auto_soldout\"":\""F\"",\""is_mandatory\"":\""T\"",\""option_id\"":\""000E\"",\""is_reserve_stat\"":\""N\"",\""item_image_file\"":null,\""origin_option_added_price\"":\""0.00\""}}';var value6 = '1';var value7 = 'string;must-catch'; var value8 = 8; var value9 = 'S'; var value10 = 'T'; </script> </body> </html>"; 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