Regular Expressions 101

Pro

Negative Lookbehind(?<!\d)

\da digit

Negative Lookbehind(?<!\d\.)

\da digit

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:\d{1,3}(?:,\d{3})*|\d+)

1st Alternative\d{1,3}(?:,\d{3})*

\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

2nd Alternative\d+

\d+a digit, repeated at least once

Non-Capturing Group(?:\.\d{1,2})?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d{1,2}a digit, repeated between 1 and 2 times

Negative Lookahead(?!\.?\d)

\.?optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

\da digit

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{1,3}(?:,\d{3})*|\d+)(?:\.\d{1,2})?(?!\.?\d)

New

120,000.00
40,000
456,667
334532
123,223,333.34

120,000.00
40,000
456,667
334532
123,223,333.34