Regular Expressions 101

Pro

^start of line

\d+a digit, repeated at least once

Group 1([.,]\d+)?

?repeats the group contents below at most once:

Character Class[.,]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\d+a digit, repeated at least once

$end of line

Global pattern flags

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

25 tokens

^\d+([.,]\d+)?$

New

12345
1.2344
1,2345
+123.34@@##sdsd

12345
1.2344
1,2345
+123.34@@##sdsd