Regular Expressions 101

Pro

^start of line

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

1st Alternative\d+[.,]\d*

\d+a Unicode decimal digit, repeated at least once

Character Class[.,]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\d*a Unicode decimal digit, repeated any number of times

2nd Alternative[.,]?\d+

Character Class[.,]?

?matches at most one character from the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\d+a Unicode decimal 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

1
123
123.
123.4
123.456
.456
123,
123,4
123,456
,456

0.,1
0a,1
0..1
1.1.2
100,000.99
100.000,99

1
123
123.
123.4
123.456
.456
123,
123,4
123,456
,456

0.,1
0a,1
0..1
1.1.2
100,000.99
100.000,99