Fact.java

import java.util.Scanner;

class Factorial
{
    int p;
    public int n;

    Factorial()
    {
        p = 1;
    }

    int fact()
    {
        for(;n>=1;n--)
        {
            p *= n;
        }
        return p;
    }
}

class Fact
{
    public static void main(String[] args)
    {
        Factorial f = new Factorial();
        Scanner s = new Scanner(System.in);

        System.out.print("Enter the number : ");
        f.n = s.nextInt();
        int fc = f.fact();
        System.out.println("Factorial = "+fc+"\n");
    }
}