How do we call a C# method recursively?

To call a C# method recursively, you can try to run the following code. Here, Factorial of a number is what we are finding using a recursive function display().

If the value is 1, it returns 1 since Factorial is 1.

if (n == 1)
return 1;

If not, then the recursive function will be called for the following iterations if 1you want the value of 5!

Interation1: 5 * display(5 - 1);
Interation2: 4 * display(4 - 1);
Interation3: 3 * display(3 - 1);
Interation4: 4 * display(2 - 1);

The following is the complete code to call a C# method recursively.

Example

using System;
namespace MyApplication {
   class Factorial {
      public int display(int n) {
         if (n == 1)
         return 1;
         else
         return n * display(n - 1);
      }
      static void Main(string[] args) {
         int value = 5;
         int ret;
         Factorial fact = new Factorial();
         ret = fact.display(value);
         Console.WriteLine("Value is : {0}", ret );
         Console.ReadLine();
      }
   }
}

Output

Value is : 120