C#

using System;

namespace CalculatetothePowerof
{
    class Program
    {
        static void Main()
        {
            int valOne = AcceptValue("Enter your first number:");
            int valTwo = AcceptValue("\nEnter your second number:");
            Console.WriteLine(Math.Pow(valOne, valTwo));
            Console.Read();
        }
        static int AcceptValue(string message)
        {
            string valueOne;
            int IntOne;
            string YesNo;
            do
            {
                Console.WriteLine(message);
                valueOne = Console.ReadLine();
                IntOne = Convert.ToInt32(valueOne);
                Console.WriteLine("Are you sure you want to use that number?\nPress lowercase y or n, to continue.");
                YesNo = Console.ReadLine();
                if (YesNo == "y")
                {
                    break;
                }
                Console.Clear();
            } while (YesNo != "y");
            return IntOne;
        }
    }
}

string valueOne = Console.ReadLine();
int IntOne = 0;
bool result = Int32.TryParse(valueOne, out IntOne);
if (!result)
{
  Console.WriteLine("Attempted conversion of '{0}' failed.", IntOne);
  AcceptValueOne();
}

bool result = false;
do
{
  string valueOne = Console.ReadLine();
  result = Int32.TryParse(valueOne, out IntOne);
  if (!result)
  {
    Console.WriteLine("Attempted conversion of '{0}' failed, please try again.", valueOne);
  }
} while (!result);

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