Regular Expressions 101

Pro

^start of string

Character Class[+-]?

?matches at most one character from the set below:

+the literal + (43₁₀ / 53₈ / 2B₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{1,3}a digit, repeated between 1 and 3 times

Non-Capturing Group(?:,\d{3})*

*repeats the group contents below any number of times:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\d{3}a digit, repeated exactly 3 times

Non-Capturing Group(?:[.]\d{2})?

?repeats the group contents below at most once:

Character Class[.]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d{2}a digit, repeated exactly 2 times

$end of string, or before its final line terminator

Detailed match information will be displayed here automatically.

25 tokens

^[+-]?\d{1,3}(?:,\d{3})*(?:[.]\d{2})?$

New

0
12
12.123
12,12
12,
123.
12,123,123.88
12,123,123.12456
12125457.22
1,1,1,1
1.1

0
12
12.123
12,12
12,
123.
12,123,123.88
12,123,123.12456
12125457.22
1,1,1,1
1.1