递归阶乘

[java]代码库

public class Test3 {
      
    public static void main(String[] args) {
        int k = fn(5);
        System.out.println(k);
         
    }
    public static int  fn(int n) {
        int num = 1;
        if (n==1){
            return 1;
        }
        else {
            return n*fn(n-1);
        }
     
    }
      
}