Compound Assignment Operators

CODE

class CompoundAssignments
{
    public static void main(String arg[])
    {
        int x = 5;
        int y = 2;
        int z = 3;
        
        x += 6; // LINE A
        y *= 8; // LINE B
        z += y * x; // LINE C
        z %= 7; // LINE D
        
        System.out.println("x = " + x);
        System.out.println("y = " + y);
        System.out.println("z = " + z);
    
    }
}

OUTPUT

x = 11
y = 16
z = 4

DESCRIPTION

Here, we have declared three variables x, y and z and initialized them.
In LINE A, 6 is added to previous x value, which is 5 and assigned to x again. So x becomes 11 (= 5 + 6).
In LINE B, the value of y is changed to 16 (= 8 * 2) from 2.
In LINE C, the y * x (= 16 * 11 = 176) is added to z and assigned to z again. So z changes from 3 to 179 (= 176 + 3).
In LINE D, the value of z % 7 is assigned to z, so z becomes 4 (= 179 % 7).

THINGS TO TRY

Change the order of the lines A, B, C and D to B, A, D and C and see what will be the output. Try some other order of lines and check if the output is per your understanding.

Change the order of the lines such that the x is 11, y is 16 and z is 25 at the end of the program.

Try other operators like -= and /=.

Try it Online

Compound Assignment Operators - Java Example Program