带标签的break和continue语句 *寻找100~150之间的质数*

Posted 2020-10-23 zbgghost

 1 //比较break和continue语句的不同
 2 public class TestBreakContinue {
 3     public static void main(String[] args){
 4         int a = 0;
 5         System.out.println("Begin");
 6         while(true){
 7             a++;
 8             int b = (int)Math.round(100*Math.random());
 9             if(b==88)break;
10         }
11         System.out.println("Game Over\\n"+"you used "+ a +" times");
12         System.out.println("**********************");
13         for(int i = 100;i<=150;i++){
14             if(i%3==0)
15                 continue;
16             System.out.println(i);
17         }
18         //带标签的break和continue---goto
19         System.out.println("*******************");
20         int count = 0;
21         //100~150之间有多少质数
22         outer:for(int n=101;n<150;n++){
23             for(int m=2;m<n/2;m++){
24                 if(n%m==0)
25                     continue outer;    //直接返回第一个for循环；n的值不会被重置
26             }
27             System.out.print(n+"\\t");
28             count++;
29         }
30         System.out.println("总共有"+count+"个质数");
31             
32             
33     }
34 
35 }