Regular Expressions 101

Negative Lookbehind(?<!\S)

\Sany non-whitespace character

Non-Capturing Group(?:[0-9]{1,2}[,.'][0-9]{3}|[0-9]{3,})

1st Alternative[0-9]{1,2}[,.'][0-9]{3}

Character Class[0-9]{1,2}

{1,2}matches between 1 and 2 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Character Class[,.']

,the literal , (44₁₀ / 54₈ / 2C₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

Character Class[0-9]{3}

{3}matches exactly 3 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

2nd Alternative[0-9]{3,}

Character Class[0-9]{3,}

{3,}matches at least 3 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Negative Lookahead(?!\S)

\Sany non-whitespace character

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

(?<!\S)(?:[0-9]{1,2}[,.'][0-9]{3}|[0-9]{3,})(?!\S)

New

some text 12.444 12,444 12'444 123.122 12.1234 12345 1234 12.12 12.1234567 12.242Text 12.242 Text Text12.242 Text12.242Text