Regular Expressions 101

Pro

1st Alternative(?<!\d)-?\d+(?:\.\d+)?

Negative Lookbehind(?<!\d)

\da digit

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

\d+a digit, repeated at least once

Non-Capturing Group(?:\.\d+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

2nd Alternative\D

\Dany character that's not a digit

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)-?\d+(?:\.\d+)?|\D

New

-99+44+2+-3/3.2-6
31+2--3*43.8/1%(1*2)

-99+44+2+-3/3.2-6
31+2--3*43.8/1%(1*2)