Regular Expressions 101

Explanation
Pro

^start of line

Character Class[A-Z]

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

\d{2}a digit, repeated exactly 2 times

Non-Capturing Group(?:\.\d{1,2}|\d{0,2})

1st Alternative\.\d{1,2}

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d{1,2}a digit, repeated between 1 and 2 times

2nd Alternative\d{0,2}

\d{0,2}a digit, repeated between 0 and 2 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.

25 tokens

^[A-Z]\d{2}(?:\.\d{1,2}|\d{0,2})$

D99
M00.0
M01.6
J98.3
T05.0
M96.81
D68.20
D3412
D34.

9D.0
6G
7H.
M96.811
J234.82
G687.1
GU87.11

D99
M00.0
M01.6
J98.3
T05.0
M96.81
D68.20
D3412
D34.

9D.0
6G
7H.
M96.811
J234.82
G687.1
GU87.11