Regular Expressions 101

Explanation

Pro

^start of line

\d+a digit, repeated at least once

Non-Capturing Group(?:,\d{1,2})?

?repeats the group contents below at most once:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\d{1,2}a digit, repeated between 1 and 2 times

Non-Capturing Group(?:\+\d+(?:,\d{1,2})?){0,4}

{0,4}repeats the group contents below between 0 and 4 times:

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

\d+a digit, repeated at least once

Non-Capturing Group(?:,\d{1,2})?

?repeats the group contents below at most once:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\d{1,2}a digit, repeated between 1 and 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.

26 tokens

^\d+(?:,\d{1,2})?(?:\+\d+(?:,\d{1,2})?){0,4}$

New

10+5,1+6,20
10

6+4+8,9+3+9+3
10,2+4+6+
10,+5