Regular Expressions 101

^start of line

Character Class[A-Z]

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

\da digit

Positive Lookahead(?=.*?[#@*])

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

Character Class[#@*]

#the literal # (35₁₀ / 43₈ / 23₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

*the literal * (42₁₀ / 52₈ / 2A₁₆)

.{3,}any character (except for line terminators), repeated at least 3 times

\d{3}a digit, repeated exactly 3 times

$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.

26 tokens

Regular Expression

^[A-Z]\d(?=.*?[#@*]).{3,}\d{3}$

New

A4#Fgf344
A4Fg#f344
A3#123