Regular Expressions 101

^start of line

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

1st Alternative\d+(?:\.\d+)?

\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

2nd Alternative\.\d+

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

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

*repeats the group contents below any number of times:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

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

1st Alternative\d+(?:\.\d+)?

\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

2nd Alternative\.\d+

\.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.

Search reference

Regular Expression

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

New

9.8,8.6
9.8
8.2,9
5,9
9.8,8.6,1.1
1,8.6
9.8,8.6,1.1
8,8,8
9.8,8,8
1,1
1,1,.1,1
5.5.5
3,3,3.3.3