1 - Explain the working of this code?

Question

#include <iostream>
using namespace std;

int main() {
int x = 5, y = 3;
while(x)
{
y += x;

x--;

}
cout << y;
return 0;
}
Output : 18

Answer 1

with each iteration of the while loop, the variable x is added to the variable y (y+=x), then the variable x decreases by 1 (x--), the loop will stop when x = 0.
we get: y = 3 + 5 + 4 + 3 + 2 + 1 = 18

Answer 2

OK I understand it Now thanks