Code
regex
a* zero or more
a+ one or more
a? zero or one
a{3} exactly 3
a{3,} 3 or more
a{3,5} between 3 and 5
a*? lazy (fewest) version of *
a+? lazy one or more
colou?r matches color or colourRegex
Quantifiers
Control how many times a token repeats.
#quantifier#greedy#lazy