Regular Expressions 101

^start of line

Group before(?<before>[a-zA-Z]+)?

?repeats the group contents below at most once:

Character Class[a-zA-Z]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\s?optionally matches any whitespace character

Group number(?<number>[0-9].*?)

Character Class[0-9]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

.*?any character (except for line terminators), repeated any number of times

\s?optionally matches any whitespace character

Group after(?<after>[a-zA-Z]+)?

?repeats the group contents below at most once:

Character Class[a-zA-Z]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

^(?<before>[a-zA-Z]+)?\s?(?<number>[0-9].*?)\s?(?<after>[a-zA-Z]+)?$

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