Android How to Program, 3/e

C.12 Increment and Decrement Operators

Java provides two unary operators (summarized in Fig. C.10) for adding 1 to or subtracting 1 from the value of a numeric variable. These are the unary increment operator, ++, and the unary decrement operator, --. A program can increment by 1 the value of a variable

Fig. C.10 Increment and decrement operators

Operator	Operator name	Sample expression	Explanation
++	prefix increment	++a	Increment a by 1, then use the new value of a in the expression in which a resides.
++	postfix increment	a++	Use the current value of a in the expression in which a resides, then increment a by 1.
--	prefix decrement	--b	Decrement b by 1, then use the new value of b in the expression in which b resides.
--	postfix ...