2021.04.08計算5的階乘

計算5的階乘

計算5的階乘 5！=1*2*3*4*5

public static void main(String[] args) {

        int aa = aa(5);
        System.out.println(aa);

    }

    public static int aa(int n){
        int result;

        if (n==1){

            result = 1;

        }else {
            result= n*aa(n-1);
        }
        return result;
    }