//1

using System;

Console.Write("enter the starting number has to be 1 to 10");

int num1 = int.Parse(Console.ReadLine());

void FactorialSum(int num){

    while (num < 11){

        int st = num;

        int final = num;

        while (st > 1){

                st --;

                if (num == 1){

                    final = 1;

                }

                else{

                    final = final * st;

                }

        }

        Console.WriteLine(num + "! = " + final);

        num ++;

    }

}

FactorialSum(num1);