在java中使用递归返回10的阶乘

Question

Hello I have written the following code to return the factorial of n when the the value is 10 but i cant get my program to work. I have never used Java before and I am a beginner.

public static int Factorial(n)
{
    if (n == 0) {
        return 1;
    } else {
        return( n * Factorial(n-1) );
    }
}

public static int main(args) {
    System.out.println(Factorial(10));
}

Answer 1

You lack a few type definitions and the required main method. Your class should look like this to work:

public class Main {
    public static int Factorial(int n) {
        if (n == 0) {
            return 1;
        } else {
            return(n * Factorial(n-1));
        }
    }

    public static void main(String args[]) {
        System.out.println(Factorial(10));
    }
}

Answer 2

You could also try this:

int factorial(int n) 
{
 return (n>=1 ? n * factorial(n-1) : 1);
}