A cappuccino is similar, in ways, to a latte.  They are both made with espresso and frothed milk.

The difference is that a cappuccino is made with a more stiff air froth than the latte.

A cappuccino is 1/3 espresso, 1/3 steamed milk and 1/3 stiff airy frothed milk

A Latte is espresso and steamed milk with less air in the milk.

Lattes are regularly flavored with syrups to taste.