Javaopp求幂的方法，要求传入一个整数计算这个数的幂

Question

Answer 1

 public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int i = scanner.nextInt();
        int sum=0;
        for (int j = i; j >0 ; j--) {
            sum+=j;
        }
        System.out.println(sum);
    }