7/21/2019 Factorial de Programacion C#

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{  class Program  {  static void Main(string[] args)  {  ulong a = 1, b = 1 ;  Console.Write("Ingresa un número : ");  ulong c = ulong.Parse(Console.ReadLine());  Console.WriteLine("-------------------------\n");  while (a <= c)  {  b *= a;  Console.WriteLine("El factorial de {0} es : {1}",a,b);  a++;  }  Console.Write("\nPresiona ENTER para salir....");  Console.ReadLine();  }  }}