Regular Expressions 101

Pro

^start of line

Non-Capturing Group(?:\d{1,3}[A-I])?

?repeats the group contents below at most once:

\d{1,3}a digit, repeated between 1 and 3 times

Character Class[A-I]

A-Ione character from A (65₁₀) to I (73₁₀) (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

^(?:\d{1,3}[A-I])?$


123A
123b
123B
12Z
12A
A
10A
123B
33F
1A
1234A


123A
123b
123B
12Z
12A
A
10A
123B
33F
1A
1234A