求解答 刚入门不是很会做

Question

Answer 1

public class Test3 {
    public static void main(String[] args) {
        int i = 1;
        int sum = 0;
        do {
            if (i % 7 == 0) {
                sum += i;
            }
            i++;
        } while (i <= 50);
        System.out.println("1至50中是7的倍数的数值之和为：" + sum);
    }
}