PROGRAM TO FIND FACTORIAL OF GIVEN NUM.

INPUT--

#include <iostream>

using namespace std;

int main()

{

    unsigned int n;

    unsigned long long factorial = 1;

    cout << "Enter a positive integer: ";

    cin >> n;

    for(int i = 1; i <=n; ++i)

    {

        factorial *= i;

    }

    cout << "Factorial of " << n << " = " << factorial;    

    return 0;

}

OUTPUT--

Enter a positive integer: 12

Factorial of 12 = 479001600