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

package main import ( "regexp" "fmt" ) func main() { var re = regexp.MustCompile(`(?m)100(\.[0]{1,2})?|([0-9]|[1-9][0-9])(\.[0-9]{1,2})? %`) var str = `Service Level Report for BESIX CONSTRUCT L.L.C For October 2022 to December 2022 Section 1 - SLA Status DPI Basic Availability Service details Uptime Comments Description Service Type Media Option Committed Actual Status 900102711890_DPI - DPI - Main - Besix Basic IDA Fiber/- Basic 99 100.00 % Complied construct LLC DPI Basic Jitter Service details Uptime Comments Description Service Type Media Option Committed Actual Status 900102711890_DPI - DPI - Main - Besix Basic IDA Fiber/- Basic 95 79.44 % Violated construct LLC DPI Basic Latency Service details Uptime Comments Description Service Type Media Option Committed Actual Status 900102711890_DPI - DPI - Main - Besix Basic IDA Fiber/- Basic 95 98.94 % Complied construct LLC DPI Basic Packet Loss Service details Uptime Comments Description Service Type Media Option Committed Actual Status 900102711890_DPI - DPI - Main - Besix Basic IDA Fiber/- Basic 95 99.93 % Complied construct LLC 24/02/2023 15:07:08 +0400` 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/