Regular Expressions 101

Explanation

Pro

Positive Lookbehind(?<=[A-Za-z])

Character Class[A-Za-z]

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

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

\da digit

Negative Lookahead(?!\d)

\da digit

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.

26 tokens

(?<=[A-Za-z])\d(?!\d)

New

I am the number1
I am the number11
I am the 1 number1
I am number1 1 and you number2 2

I am the number1
I am the number11
I am the 1 number1
I am number1 1 and you number2 2