Regular Expressions 101

Pro

^start of line

\d{1,3}a digit, repeated between 1 and 3 times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{1,3}a digit, repeated between 1 and 3 times

Non-Capturing Group(?:,\d{1,3}-\d{1,3})?

?repeats the group contents below at most once:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\d{1,3}a digit, repeated between 1 and 3 times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{1,3}a digit, repeated between 1 and 3 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{1,3}-\d{1,3}(?:,\d{1,3}-\d{1,3})?$

New

499-999,0-99
499-999

499-999,0-99
499-999