Java 递归 “* +”

public class Recall {
    
    
    public static void main(String[] args){
    
    
        int n=4;
        int result = method(n);
        System.out.println(result);
    }
    public static int method(int n){
    
    
        if(n==1){
    
    
            return 1;
        }
        return n*method(n-1);
    }
}

public class Recall {
    
    
    public static void main(String[] args){
    
    
        int n=4;
        int result = method(n);
        System.out.println(result);
    }
    public static int method(int n){
    
    
        if(n==1){
    
    
            return 1;
        }
        return n+method(n-1);
    }
}

递归经典