Regular Expressions 101

Pro

^start of line

\d+a digit, repeated at least once

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

*repeats the group contents below any number of times:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\d+a digit, repeated at least once

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

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

$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+(?:,\d+)*(?:\.\d+)?$

New

12,34,56,7.89
12345
123,45
123.45
12,345,678
123,,45
12.34.56