Regular Expressions 101

^start of line

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

Group 1(\.\d{1,14})?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d{1,14}a digit, repeated between 1 and 14 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.

Search reference

Regular Expression

^\d{1,2}(\.\d{1,14})?$

1
12
0
99
1.0
11.0
99.0
99.99999999999999

123
100
123.1