Regular Expressions 101

Explanation
Pro

^start of line

Character Class[A-Z]

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

\da digit

Character Class[.]?

?matches at most one character from the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d?optionally matches a digit

$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

^[A-Z]\d\d[.]?\d?\d?$

New

D99
M00.0
M01.6
J98.3
T05.0
D96.81
M68.20
9D.0
6G
7H.
M96.811
J234.82
G687.1
GU87.11