Metacharachters in regex

Question

In regex whats the difference between the metacharachters - ? and *

Both of them seem to mean 'zero or more repetitions' of the previous thing ?

So if I was to use the pattern :

r"colo(u)*r"

OR

r"colo(u)?r"

They would both give me the same result.

Am I missing something ?

Answer 1

Sorry I just realized ? means zero or ONE and * is zero or MORE