Regular Expressions 101

^start of line

\.?optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

Negative Lookahead(?!-)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d+a digit, repeated at least once

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

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d{1,2}a digit, repeated between 1 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.

Search reference

Regular Expression

^\.?(?!-)\d+(?:\.\d{1,2})?$

New

123.12
2
56754
92929292929292.12
0.21
3.1
.90

12.12dd
2.23332
e666.76
-1.23
-54.3242
3.98A
56B
BBB.12C
14.23.56
1..45