Regexp - (Quantifier|Cardinality Indicators)

A quantifier defines the number of times that:

• character
• class of character
• grouped (or not)

may be seen.

It has three behaviors:

• a Greedy one: match longest possible string. This is the default regular expression behavior.
• a Lazy one: match shortest possible string. Match as few as possible, repeat as few times as possible
• a Possessive one.