public static void Main()
Console.WriteLine("By Brandon Eduardo Cortes Correa");
Console.Write("Convert Octal number to Decimal number:\n");
Console.Write("------------------------------------------");
Console.Write("Input an octal number (using digit 0 - 7) :");
n1 = Convert.ToInt32(Console.ReadLine());
Console.Write("\nThe number is not an octal number. \n\n");
Console.Write("\nThe Octal Number : {0}\nThe equivalent Decimal Number : {1} \n\n",n5,dec);