Regular Expressions 101

Pro

^start of line

\€?optionally matches the literal € (8364₁₀ / 20254₈ / 20AC₁₆)

Group 1(\d{1,3}[.](\d{3}[.])*\d{3}|\d+)

1st Alternative\d{1,3}[.](\d{3}[.])*\d{3}

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

Character Class[.]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 2(\d{3}[.])*

*repeats the group contents below any number of times:

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

Character Class[.]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

2nd Alternative\d+

\d+a digit, repeated at least once

Group 3([,]\d{1,2})?

?repeats the group contents below at most once:

Character Class[,]

,the literal , (44₁₀ / 54₈ / 2C₁₆)

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

$end of line

Global pattern flags

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

2345678914564644,61
€1.000.000,21
1.123.123
€0000000
€1.123.123,12
€1,123,123

2345678914564644,61
€1.000.000,21
1.123.123
€0000000
€1.123.123,12
€1,123,123