Why does this ==20

Question

#include<iostream>
using namespace std;
int main()
{
int x, y, z;
y = z = 0;
for (x=0; x<10; x++)
{
y = y + 1;
}
z = x + y + z;
cout << z;
}

Answer 1

Y0gurt because you have both x & y adding 1 each cycle
x++ is incrementing
and y = y + 1 is doing the same thing
so when x is 9 it increments one last time to 10 and y = 10 so x + y = 20 + z which is 0 as it was not used in the loop itself. So when z was finally used it was 20

Answer 2

BroFar BroFar thank you so much! that helps alot :)