做出决策

1public class Main {
2    public static void main(String[] args) {
3        int score = 85;
4
5        if (score >= 90) {
6            System.out.println("A grade");
7        } else if (score >= 80) {
8            System.out.println("B grade");
9        } else {
10            System.out.println("Keep working on it!");
11        }
12
13    }
14}