using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

public class Program

{

    public static double Step(double x,double n)

    {

        if(n==0) return 1;

        else if (n>0)

        {

            return Step(x,n-1)*x;

        }

        else  return 1/Step(x,-n);

    }

    public static void Main()

    {

        double n = 10;

        double x = 2;

          Console.WriteLine(Step(x,n));

    }

}

​