Numbers & Math

Enemy 1 of 5

Whole numbers use the int type (short for "integer"). The basic arithmetic operators are + (add), - (subtract), * (multiply), and / (divide), and Java follows the same order of operations you'd expect from math class: multiplication and division happen before addition and subtraction, unless parentheses say otherwise.

Store the parts in clearly-named int variables, then combine them inside println. Because both price and quantity are declared as int, Java guarantees the multiplication is safe, whole-number arithmetic — no risk of one of them secretly being text.