Regular Expressions 101

1st Alternative(?<=[a-zA-Z])\d+

Positive Lookbehind(?<=[a-zA-Z])

Character Class[a-zA-Z]

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

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

\d+a Unicode decimal digit, repeated at least once

2nd Alternative\d+(?=[a-zA-Z])

\d+a Unicode decimal digit, repeated at least once

Positive Lookahead(?=[a-zA-Z])

Character Class[a-zA-Z]

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

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

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.

Search reference

Regular Expression

(?<=[a-zA-Z])\d+|\d+(?=[a-zA-Z])

New

I need this number inside my wor5d, but also this word3 and this 4word, but not this 1 and not this 555.