Regular Expressions 101

1st Alternative^([a-zA-Z]{1,2}\d{1,2})\s*?(\d[a-zA-Z]{2})$

^start of string

Group 1([a-zA-Z]{1,2}\d{1,2})

Character Class[a-zA-Z]{1,2}

{1,2}matches between 1 and 2 characters from the set below:

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

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

\d{1,2}a digit, repeated between 1 and 2 times

\s*?any whitespace character, repeated any number of times

Group 2(\d[a-zA-Z]{2})

\da digit

Character Class[a-zA-Z]{2}

{2}matches exactly 2 characters from the set below:

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

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

$end of string

2nd Alternative^([a-zA-Z]{1,2}\d{1,2})$

^start of string

Group 3([a-zA-Z]{1,2}\d{1,2})

Character Class[a-zA-Z]{1,2}

{1,2}matches between 1 and 2 characters from the set below:

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

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

\d{1,2}a digit, repeated between 1 and 2 times

$end of string

Global pattern flags

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^([a-zA-Z]{1,2}\d{1,2})\s*?(\d[a-zA-Z]{2})$|^([a-zA-Z]{1,2}\d{1,2})$

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