Regular Expressions 101

^start of line

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

+repeats the group contents below at least once:

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

\d+a digit, repeated at least once

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

?repeats the group contents below at most once:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d+a digit, repeated at least once

,?optionally matches the literal , (44₁₀ / 54₈ / 2C₁₆)

$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.

Search reference

Regular Expression

^(?:(?:\d+(?:-\d+)?),?)+$

1
1-2
1,23,1-4,5,23,123
1,2,3,4,5,6-10
1,123-123,4,1,66,123
1-2,2-3,3-4,4-5,6-7,8,9,10