编辑代码

class Main {
	 public static int getNum(int n) {
        if(n == 1) {
            return 1;
        }
        int temp=getNum(n-1);
        return temp+n;
    }
    public static void main(String[] args) {
        int num=getNum(6);
        
        System.out.println(num);
	}

}