Regular Expressions 101

1st Alternative(?<=\d)(?=k?g\b)

Positive Lookbehind(?<=\d)

\da digit

Positive Lookahead(?=k?g\b)

k?optionally matches the literal k (107₁₀ / 153₈ / 6B₁₆) (case sensitive)

gthe literal g (103₁₀ / 147₈ / 67₁₆) (case sensitive)

\ban ASCII word boundary

2nd Alternative(?<=[^\d\s][.,])(?=\d)

Positive Lookbehind(?<=[^\d\s][.,])

Negated Character Class[^\d\s]

\da digit

\sany whitespace character

Character Class[.,]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Positive Lookahead(?=\d)

\da digit

Global pattern flags

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?<=\d)(?=k?g\b)|(?<=[^\d\s][.,])(?=\d)

New

bacon
1,54g
eggs
600g
600a
600G
jalapeno.300g
this, is a test.3.4444.5 times, 4,5.3
1,000,000.00

.3 times
123abc