The main base of most 'candy' is sugar...then it is flavored with different things...flavors, cocoa, etc.
Gum:
Chicle is the natural gum from Manilkara chicle, which is a tropical evergreen tree native to Central America. It was traditionally used in chewing gum. While the Wrigley Company was a prominent user of this material, today there are only a few companies that still make chewing gum from natural chicle. This is because by the 1960s chicle was replaced by butadiene-based synthetic rubber which was cheaper to manufacture.
Butadiene-based synthetic rubber, with flavor and even some sugar added...does not make it a candy.