Regular Expressions 101

\ban ASCII word boundary

Group 1(\d+)

\d+a digit, repeated at least once

Non-Capturing Group(?:(?:[\.\s]0+|(\.\d+)))?

?repeats the group contents below at most once:

Non-Capturing Group(?:[\.\s]0+|(\.\d+))

1st Alternative[\.\s]0+

Character Class[\.\s]

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\sany whitespace character

0+the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated at least once

2nd Alternative(\.\d+)

Group 2(\.\d+)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

\s?optionally matches any whitespace character

USDthe literal text USD (case sensitive)

Global pattern flags

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

Detailed match information will be displayed here automatically.

26 tokens

Regular Expression

\b(\d+)(?:(?:[\.\s]0+|(\.\d+)))?\s?USD

New

123.00 USD
1234 USD
357.0 USD
456 00 USD
651USD
753.684 USD
123 456 USD
-123 USD
789.00 XXX
123.00 wrongcurrency
test string
$159

123.00 USD
1234 USD
357.0 USD
456 00 USD
651USD
753.684 USD
123 456 USD
-123 USD
789.00 XXX
123.00 wrongcurrency
test string
$159