Regular Expressions 101

Pro

^start of string

-?optionally matches the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[0-9]+

+matches at least one character from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Non-Capturing Group(?:\.[0-9]{1,4})?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[0-9]{1,4}

{1,4}matches between 1 and 4 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

$end of string, or before its final line terminator

Detailed match information will be displayed here automatically.

25 tokens

^-?[0-9]+(?:\.[0-9]{1,4})?$

New

222,222,264.00
+2,424,24.34
-264
264.00
0.
0.11111
0.1111

222,222,264.00
+2,424,24.34
-264
264.00
0.
0.11111
0.1111