Regular Expressions 101

Pro

\ban ASCII word boundary

Non-Capturing Group(?:[1-2]?[0-9]\.[0-9]{1,4})

Character Class[1-2]?

?matches at most one character from the set below:

1-2one character from 1 (49₁₀) to 2 (50₁₀)

Character Class[0-9]

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[0-9]{1,4}

{1,4}matches between 1 and 4 characters from the set below:

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

\ban ASCII word boundary

Negated Character Class[^a-zA-Z\d]{0,3}

{0,3}matches between 0 and 3 characters outside the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\da digit

%?optionally matches the literal % (37₁₀ / 45₈ / 25₁₆)

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

\b(?:[1-2]?[0-9]\.[0-9]{1,4})\b[^a-zA-Z\d]{0,3}%?

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