Regular Expressions 101

^start of line

Group 1(\d+)

\d+a digit, repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 2(\d+)

\d+a digit, repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 3(\d)+

+repeats the group contents below at least once:

\da digit

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

?repeats the group contents below at most once:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 4(\d+)

\d+a digit, repeated at least once

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

New

2.18.0-10597
2.18.20
10.23.1-1