Regular Expressions 101

Non-Capturing Group(?:<\D|^)

1st Alternative<\D

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\Dany character that is not a Unicode decimal digit

2nd Alternative^

^start of line

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

Non-Capturing Group(?:\.\d{3})+

+repeats the group contents below at least once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

Positive Lookahead(?=[^\d.]|$)

1st Alternative[^\d.]

Negated Character Class[^\d.]

\da Unicode decimal digit

.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

Regular Expression

(?:<\D|^)\d{1,3}(?:\.\d{3})+(?=[^\d.]|$)

New


1.000
34.234.233

Don't match
1
456
100.00
A sentence.


1.000
34.234.233

Don't match
1
456
100.00
A sentence.