Regular Expressions 101

^start of line

-?optionally matches the literal - (45₁₀ / 55₈ / 2D₁₆)

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

Non-Capturing Group(?:(?:,\d{3}){0,4}(?:\.\d{1,2})|(?:(?:\s\d{3}){0,4}|(?:\d{0,12}))(?:[.,]\d{1,2})?)

1st Alternative(?:,\d{3}){0,4}(?:\.\d{1,2})

Non-Capturing Group(?:,\d{3}){0,4}

{0,4}repeats the group contents below between 0 and 4 times:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

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

Non-Capturing Group(?:\.\d{1,2})

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

2nd Alternative(?:(?:\s\d{3}){0,4}|(?:\d{0,12}))(?:[.,]\d{1,2})?

Non-Capturing Group(?:(?:\s\d{3}){0,4}|(?:\d{0,12}))

1st Alternative(?:\s\d{3}){0,4}

Non-Capturing Group(?:\s\d{3}){0,4}

{0,4}repeats the group contents below between 0 and 4 times:

\sany whitespace character

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

2nd Alternative(?:\d{0,12})

Non-Capturing Group(?:\d{0,12})

\d{0,12}a digit, repeated between 0 and 12 times

Non-Capturing Group(?:[.,]\d{1,2})?

?repeats the group contents below at most once:

Character Class[.,]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

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

$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.

Search reference

Regular Expression

^-?\d{1,3}(?:(?:,\d{3}){0,4}(?:\.\d{1,2})|(?:(?:\s\d{3}){0,4}|(?:\d{0,12}))(?:[.,]\d{1,2})?)$

New

123456
123456.12
123456,00
123,456.12
123,456,12
123 456.12
123,456,12
123,456,123,123,123.00

123,456.123
123 456,789.12