Question

How to calculate factorial using recursion in C#

Answer 1

using System;

public class Program
{
    public static int factorial(int n) {
        return (n == 1 || n == 0) ? 1 : n * factorial(n - 1);
    }

    public static void Main() {
        int n = 5;

        Console.Write(factorial(n));
    }
}



/*
run:

120

*/

 

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Answer 2

using System;
 
public class Program
{
    static int factorial(int n) => n == 0 ? 1 : n * factorial(n - 1); 

    public static void Main() {
        int n = 5;
 
        Console.Write(factorial(n));
    }
}
 
 
 
/*
run:
 
120
 
*/

 

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