Regular Expressions 101

Pro

^start of line

Group 1(\+|-)?

?repeats the group contents below at most once:

1st Alternative\+

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

2nd Alternative-

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 2(((\d{1,3}[, ])(\d{3}[ ,])*\d{3})|\d+)

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

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

Group 4(\d{1,3}[, ])

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

Character Class[, ]

,the literal , (44₁₀ / 54₈ / 2C₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

Group 5(\d{3}[ ,])*

*repeats the group contents below any number of times:

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

Character Class[ ,]

the literal (32₁₀ / 40₈ / 20₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

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

2nd Alternative\d+

\d+a digit, repeated at least once

Group 6( ?[\.,] ?(\d{3}[, ])*\d+)?

?repeats the group contents below at most once:

?optionally matches the literal (32₁₀ / 40₈ / 20₁₆)

Character Class[\.,]

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

?optionally matches the literal (32₁₀ / 40₈ / 20₁₆)

Group 7(\d{3}[, ])*

*repeats the group contents below any number of times:

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

Character Class[, ]

,the literal , (44₁₀ / 54₈ / 2C₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

\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

No unit tests · Add a test to get started

25 tokens

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

There are no unit tests, click to add some.