Regular Expressions 101

Pro

Group 1(^(-?)(\d{1,})((\.\d{0,2})?))

^start of line

Group 2(-?)

-?optionally matches the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 3(\d{1,})

\d{1,}a digit, repeated at least once

Group 4((\.\d{0,2})?)

Group 5(\.\d{0,2})?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\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

(^(-?)(\d{1,})((\.\d{0,2})?))$