Why compilation error?

Question

#include <iostream>
using namespace std;

int main() {

for(int d = 4; d > 1; d--)
{
d *= d;
cout << d << endl;
}
cout << "D = " << d;
}

Answer 1

Another reason could be that variable d will never be less than or equal to 0 so it will run infinitely.

Answer 2

You tried to output d outside the for loop..that variable only exists within the loop's scope,Declare it outside the loop then your code will work.

Answer 3

Yes, it's true