Introduction to Programming

Incrementing and decrementing unary operators:  ++   -- 

The following code shows how the ++ and -- operators work, depending on their position, before the variable (prefix) or after the variable (postfix):

int i = 2;System.out.println(++i);        //prints: 3System.out.println("i=" + i);   //prints: i=3System.out.println(--i);        //prints: 2System.out.println("i=" + i);   //prints: i=2System.out.println(i++);        //prints: 2System.out.println("i=" + i);   //prints: i=3System.out.println(i--);        //prints: 3System.out.println("i=" + i);   //prints: i=2

 If placed as a prefix, it changes its value by 1 before the variable's value is returned. But when placed as a postfix, it changes its value by 1 after the variable's value is returned.

The ++x expression increments ...