For the following code What does f(7) evaluate to?

Question

int f (int n) {

int ans = 0;

for (int i = 1; i < n; i++) {

if (i < n/2) {

ans -= i;

}

else {

ans += i;

}

}

return ans;

}

Answer 1

7/2 = 3 (floor division), so for iterations 1 and 2, the variable ans is decremented, resulting in a value of -2. For iterations 3 through 6, ans is incremented, resulting in a value of -2 + 4 = 2.