Question 1 v1

#include <iostream>

using namespace std;

int main()
{
    int number;
    int f = 1;
    while (cin >> number)
    {
        if (number <= 0)
            break;
        for (int i = 1; i <= number; i++)
            f = f * i;

        cout << f;
        f = 1;
    }
}