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Factorial Sum

Write a method that calculates the factorial of a given number.
Factorial is the product of all positive integers less than or equal to n.
For example:
factorial(4) = 4x3x2x1 = 24.

TIP: To make it more interesting, try to do it recursively.

 

public class BestOnlineLearning {
    
    public static int factorialSum(int n){
        int sum = 1;
          for(int i = n; i > 0; i--){
              sum = sum * i;
          }
        System.out.println(sum);
        return sum;
    }

    public static void main(String[] args) { 
      factorialSum(4); 
    }
}

 

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