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"
"
gsim

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"(FACTURA.*?(?!ELECTR))"; string input = @"CLINICA LAS UBNDES S.A. R.U.T.: 93.930.000-7 HOSPÍ ES IONAMIENTO CASA TAL: e e - LAS CONDES - SANTIAGO FACTURA NO AFECTA O SP” CLÍNICA SUCURSALES: LO FONTECILLA 4174 - LAS CONDES EXENTA ELECTRONICA CHICUREO S/N - COLINA N* 211918 E LAS CONDES EMILLE ALLAIS £91 - LO BARNECHEA CAMINO A VALLE NEVADO 41333 - LO BARNECHEA LOS PRESIDENTES $8950 - PEÑALOLEN S.l.1. - SANTIAGO ORIENTE www.clc.cl Fecha Emisión : 08-02-2023 RUT : 10.143.057-K Señor(es) : NALLY FERNANDEZ MARIA SOLEDAD Dirección : MARTIN DE ZAMORA 6306 Vencimiento Ciudad : SANTIAGO Comuna : LAS CONDES Giro : ACTIVIDADES NO ESPECIFICADAS Forma de Pago _ : CONTADO 1.698.196 DESCRIPCIÓN PETCT 1.698.196 102001 cuy SÉ Y 3 | Ss $ Y OCHO MIL CIE SON: UN MILLÓN SEISCIENTOS NOVENTA AEB NENENTA SEIS PESOS MONTO DSCTO [5 o MONTO EXENTO |$ 1.698.196 1.698.196 01: j d j sio y i We Timbre Electronico Sil fique Documento: ww Res. 138 de 29-11-2011 Veri "; RegexOptions options = RegexOptions.Singleline | RegexOptions.IgnoreCase | 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