Regular Expressions 101

Pro

Non-Capturing Group(?:(\d+\.\d+(?:\.\d+){0,1})-){0,1}

{0,1}repeats the group contents below at most once:

Group 1(\d+\.\d+(?:\.\d+){0,1})

\d+a digit, repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Non-Capturing Group(?:\.\d+){0,1}

{0,1}repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 2(\d+(?:\.\d+)*)

\d+a digit, repeated at least once

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

*repeats the group contents below any number of times:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

25 tokens

(?:(\d+\.\d+(?:\.\d+){0,1})-){0,1}(\d+(?:\.\d+)*)

New

1.0.0
1.2.3.4
1.0
1.7.10-1.2.3
1.8.1-10.0.0.1
1.10.10-2
1.5-4.63.2

1.0.0
1.2.3.4
1.0
1.7.10-1.2.3
1.8.1-10.0.0.1
1.10.10-2
1.5-4.63.2