Suppose sum and num are int variables, and the input is

20 25 10 18 -1

What is the output of the following code? (Assume that console is a Scanner object initialized to the standard input device.)

sum = 0;

num = console.nextInt();

while (num != -1)

{

if (num >= 20)

sum = sum + num;

else

sum = sum - num;

num = console.nextInt();

}

System.out.println(sum);

17

28

45

60