Regular Expressions 101

Pro

Positive Lookbehind(?<=\s|^)

1st Alternative\s

\sany whitespace character

2nd Alternative^

^start of line

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

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

\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+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

2nd Alternative\d{1,3}(?:.\d{3})*(?:\,\d+)?

\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:

.any character (except for line terminators)

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

Non-Capturing Group(?:\,\d+)?

?repeats the group contents below at most once:

\,the literal , (44₁₀ / 54₈ / 2C₁₆)

\d+a digit, repeated at least once

Positive Lookahead(?=\s|$)

1st Alternative\s

\sany whitespace character

2nd Alternative$

$end of line

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

(?<=\s|^)(?:\d{1,3}(?:,\d{3})*(?:\.\d+)?|\d{1,3}(?:.\d{3})*(?:\,\d+)?)(?=\s|$)

New

999,999.99
99,999.22
999.999,99
999.999.23,21
99.999,22
13342,4234,123.23
999,222.334552
9,234.24
2,1
111,22.113
1,3
111

999,999.99
99,999.22
999.999,99
999.999.23,21
99.999,22
13342,4234,123.23
999,222.334552
9,234.24
2,1
111,22.113
1,3
111