Regular Expressions 101

Pro

Group 1([+-]?)

Character Class[+-]?

?matches at most one character from the set below:

+the literal + (43₁₀ / 53₈ / 2B₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\s*any whitespace character, repeated any number of times

Non-Capturing Group(?:(?:(?:[^.([{]?(\d+))|(\d+\.\d+(?!\w+)))(?!\w+|\.))

Non-Capturing Group(?:(?:[^.([{]?(\d+))|(\d+\.\d+(?!\w+)))

1st Alternative(?:[^.([{]?(\d+))

Non-Capturing Group(?:[^.([{]?(\d+))

Negated Character Class[^.([{]?

?matches at most one character outside the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

(the literal ( (40₁₀ / 50₈ / 28₁₆)

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

{the literal { (123₁₀ / 173₈ / 7B₁₆)

Group 2(\d+)

\d+a digit, repeated at least once

2nd Alternative(\d+\.\d+(?!\w+))

Group 3(\d+\.\d+(?!\w+))

\d+a digit, repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Negative Lookahead(?!\w+)

\w+any word character, repeated at least once

Negative Lookahead(?!\w+|\.)

1st Alternative\w+

\w+any word character, repeated at least once

2nd Alternative\.

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negative Lookahead(?![([{])

Character Class[([{]

(the literal ( (40₁₀ / 50₈ / 28₁₆)

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

{the literal { (123₁₀ / 173₈ / 7B₁₆)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

26 tokens

([+-]?)\s*(?:(?:(?:[^.([{]?(\d+))|(\d+\.\d+(?!\w+)))(?!\w+|\.))(?![([{])

2 + 2.2b - 2 + b + 2.2(2 - 2) + 2(- 2 - 2.2 + 2)

2 + 2.2b - 2 + b + 2.2(2 - 2) + 2(- 2 - 2.2 + 2)