Nested Iteration

AP Computer Science A· difficulty 4/5

public static int run() {
    int x = 0;
    for (int i = 0; i < 4; i++) {
        for (int j = 0; j < 4; j++) {
            if (j > i) x += 1;
            else if (j < i) x -= 1;
        }
    }
    return x;
}
// Call: System.out.println(run());

What is printed?

A
$0$
check_circle
B
$-4$
C
$8$
D
$4$

Explanation

Above-diagonal count = below-diagonal count for square matrix; net = 0.

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