Regular Expressions 101

Pro

^start of line

\d{2}a Unicode decimal digit, repeated exactly 2 times

Non-Capturing Group(?:-\d{2})?

?repeats the group contents below at most once:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{2}a Unicode decimal digit, repeated exactly 2 times

Non-Capturing Group(?:,\s*\d{2}(?:-\d{2})?)*

*repeats the group contents below any number of times:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\s*a Unicode whitespace character, repeated any number of times

\d{2}a Unicode decimal digit, repeated exactly 2 times

Non-Capturing Group(?:-\d{2})?

?repeats the group contents below at most once:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{2}a Unicode decimal digit, repeated exactly 2 times

$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.

25 tokens

^\d{2}(?:-\d{2})?(?:,\s*\d{2}(?:-\d{2})?)*$

New

01,02,03,04
1002003
01,02,03
A, B, C
s01, s02, s02
E2702-2703,E2702-2703
03,05,06
05-08,09,10-12, 05-08