#include <iostream>//Factorial using recursion

using namespace std;

long int factorial(int num);//function prototype

int main()
{
  cout << factorial(8) << endl;
}

long int factorial(int num)//definition of factorial
{
  if(num==1)
    return 1;//base case
  else
    return(num*factorial(num-1));//call factorial of one number less (for example, 8! = 8*7!)
}