Regular Expressions 101

Negative Lookbehind(?<![^\W_])

Negated Character Class[^\W_]

\Wany character that is not a Unicode word character

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

vthe literal v (118₁₀ / 166₈ / 76₁₆) (case sensitive)

Non-Capturing Group(?:ersion)?

?repeats the group contents below at most once:

ersionthe literal text ersion (case sensitive)

\s?optionally matches a Unicode whitespace character

Character Class[\d.]*

*matches any number of characters from the set below:

\da Unicode decimal digit

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\ba Unicode word boundary

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

(?<![^\W_])v(?:ersion)?\s?[\d.]*\b

New

version 6.2.11 but not c2000_v6.2.11

version 6.2.11 but not c2000_v6.2.11