Thread: Sum of Factorials

Hi, I'm working on this code right now. The first method returns the factorial of an integer (factorial of 3 = 1x2x3). And the second returns the sum of the factorials between 2 integers. This is correct according to my professor. I'm just confused as to why in the 2nd methods it isn't "total = total + Factorial(i);" instead of what I have.

thanks for the help.

public class LoopProblems
{
    public int Factorial (int n){ 
 
        int total = 1;
 
        for (int i = 1; i <= n ; i++ ) {
 
            total = total * i;
        }
        return total;
 
    }
 
    public int SumOfFactorials (int start, int end) {
 
        int total = 1;
 
        for (int i = start; i <= end ; i++ ) {
 
            total = total * Factorial(i);
        }
        return total;
 
    } 
}

So I changed it to 1. Is the code correct now?

Thanks!

I'm not quite sure how to do that yet. We're not quite there yet in class. I'm going to teach myself how to do that soon. We just kind of work it out logically. To me , it should be

total = total + Factorial(i);

Thanks!

Please post your code in code or highlight tags.

Yeah. According to me too it should be (total = total + Factorial(i) because "total = total * Factorial(i);" doesnt make any logical sense relating to your question.