Factorial
Factorial is the product of an integer and all the integers below it; for example, factorial four (4!)=1*2*3*4=24. C# program for Factorial. using System; namespace Factorial { class Program { static void Main(string[] args) { int factorialNumber=1; Console.Write(“Please enter a number:”); int number = int.Parse(Console.ReadLine()); for(int i=1; i