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"
"

Test String

Code Generator

Language

Generated Code

package main import ( "regexp" "fmt" ) func main() { var re = regexp.MustCompile(`(?s)^(?=.* ABN \d{2}(?: \d{3}){3}\n(?P<products>.*\n)Qty\n).*\n\$\d+\.\d{2}\n(?P<subtotal>\d+) +SUBTOTAL\.*\nTOTAL\n\$(?P<total>\d+\.\d{2})\n`) var str = `ㅎㅎ Fresh Food The fresh food people 5619 Lorem PH: 00 0000 0000 204 Some Road TAX INVOICE - ABN 88 000 014 675 Gift Card Visa Varbl 20to500Dollars Potato White Washed 2Kg Nescafe Coffee Blend 43 50g ^HToblerone Milk Chocolate Bar 50g ^HOreo Cookie Original 133g #M&Ms Crispy 145g *HRed Rock Deli Portgse Chicken 150g ^HWrigleys Extra Pepprmint 14pc 27g(?.* Qty 57.95 3.50 5.00 0.90 1.50 4.50 3.50 2 @ $1.80 each 3.60 $80.45 9 SUBTOTAL TOTAL $80.45 REWARDS SAVINGS $10.00 Fresh Food 5619 Lorem` if len(re.FindStringIndex(str)) > 0 { fmt.Println(re.FindString(str),"found at index",re.FindStringIndex(str)[0]) } }

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 Golang, please visit: https://golang.org/pkg/regexp/