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"
"
gm

Test String

Code Generator

Language

Generated Code

// include the latest version of the regex crate in your Cargo.toml extern crate regex; use regex::Regex; fn main() { let regex = Regex::new(r"(?m)(?<=\\nTotal)\:?\D+([\d\.]+)").unwrap(); let string = "Friscos #8603\\n8100 E. Orchard Road\\nGreenwood Village, Colorado 80111\\n2013-11-02\\nTable 00\\nGuest\\n1 Oysters 1/2 Shell #1\\n1 Crab Cake\\n1 Filet 1602 Bone In\\n1 Ribeye 22oz Bone In\\n1 Asparagus\\n1 Potato Au Gratin\\n$17.00\\n$19.00\\n$66.00\\n$53.00\\n$12.00\\n$11.50\\nSub Total\\nTax\\n$178.50\\n$12.94\\nTotal\\n$191.44\\n Berghotel\\nGrosse Scheidegg\\n3818 Grindelwald\\nFamilie R. Müller\\nRech. Nr. 4572\\nBar\\n30.07.2007/13:29:17\\nTisch 7/01\\nNM\\n#ರ\\n2xLatte Macchiato à 4.50 CHF\\n1xGloki\\nà 5.00 CHF\\n1xSchweinschnitzel à 22.00 CHF\\n1xChässpätzli à 18.50 CHF\\n#ರ #ರ #1ರ\\n5.00\\n22.00\\n18.50\\nTotal:\\nCHF\\n54.50\\nIncl. 7.6% MwSt\\n54.50 CHF:\\n3.85\\nEntspricht in Euro 36.33 EUR\\nEs bediente Sie: Ursula\\nMwSt Nr. : 430 234\\nTel.: 033 853 67 16\\nFax.: 033 853 67 19\\nE-mail: grossescheidegg@bluewin.ch\\n"; // result will be an iterator over tuples containing the start and end indices for each match in the string let result = regex.captures_iter(string); for mat in result { println!("{:?}", mat); } }

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 Rust, please visit: https://docs.rs/regex/latest/regex/