Regular Expressions 101

Pro

Negative Lookahead(?!^)

^start of line

\ba Unicode word boundary

Negative Lookbehind(?<!\d\.)

\da digit

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\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

Global pattern flags

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.

27 tokens

(?!^)\b(?<!\d\.)\d+(?:\.\d+)?

34.1 ABC AB34.1 ABC 39.25 AB : 39.25