Regular Expressions 101

Pro

^start of line

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

Group 1( \d{3})?

?repeats the group contents below at most once:

the literal (32₁₀ / 40₈ / 20₁₆)

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

Group 2(([\., ])\d{3}(\4\d{3})*)?

?repeats the group contents below at most once:

Group 3([\., ])

Character Class[\., ]

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

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

Group 4(\4\d{3})*

*repeats the group contents below any number of times:

\4the text saved by group 4

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

Group 5([\.,]\d+)?

?repeats the group contents below at most once:

Character Class[\.,]

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\d+a digit, repeated at least once

$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{1,3}( \d{3})?(([\., ])\d{3}(\4\d{3})*)?([\.,]\d+)?$

New

3
13
330,1
3.1021
12 300
1,000,000
20.000.000
1,044.12
1 044,120.12

3..4
3,,4
3  4
10.,2
10.,.2
10 ,2
10..... 2

12,300.3 3
12 300.230,12.3

1 3
200 10
200 1232
10 111 22
12,12.23

1 123,123 123

.40
,40

Substitution

3
13
330,1
3.1021
12 300
1,000,000
20.000.000
1,044.12
1 044,120.12

3..4
3,,4
3  4
10.,2
10.,.2
10 ,2
10..... 2

12,300.3 3
12 300.230,12.3

1 3
200 10
200 1232
10 111 22
12,12.23

1 123,123 123

.40
,40