#include<bits/stdc++.h>
using namespace std;

class Factorial
{
    int n,p=1,i;
    public:
    Factorial()
    {
        cout<<"Enter a number: ";
        cin>>n;
        for(i=2;i<=n;i++)
            p*=i;

    }
    void display()
    {
        cout<<"\nFactorial is: "<<p;
    }
};


int main()
{
    Factorial obj;
    obj.display();

    return 0;
}