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

/
/
g

Test String

Code Generator

Language

Generated Code

package main import ( "regexp" "fmt" ) func main() { var re = regexp.MustCompile(`(TDT\+20\+LA8031\+\+\+LA)`) var str = `UNA:+.? ' UNB+UNOA:4+TAM:JJ+APIAR:ZZ+170911:1456+1709111456++APIS' UNG+PAXLST+TAM:JJ+APIAR:ZZ+170911:1456+1709111456+UN+D:02B' UNH+CRW001+PAXLST:D:02B:UN:IATA' BGM+250+DC:1.0' TDT+20+LA8031+++LA' LOC+125+GRU' DTM+189:1709091315:201' LOC+87+AEP' DTM+232:1709091610:201' NAD+FM+++RAVAZZOLLI ABUD SILVA:MARCELO+454 AGOSTINHO DE FARIA+SAO PAULO+SP+0828 0 100+BRA' ATT+2++M' DTM+329:680426' NAT+2+BRA' DOC+P:110:109+F0722522' DTM+36:251102' LOC+91+BRA' NAD+FM+++BOCK PEREIRA:RICARDO+209 NHU GUACU AP 104+SAO PAULO+SP+04625001+BRA' ATT+2++M' DTM+329:800513' NAT+2+BRA' DOC+P:110:109+FR676533' DTM+36:261003' LOC+91+BRA' NAD+FM+++BARBOSA DA SILVA:THIAGO+RUA PELOTAS 323 AP 143+SAO PAULO+SP+04012 903 +BRA'` for i, match := range re.FindAllString(str, -1) { fmt.Println(match, "found at index", i) } }

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/