java4android (练习使用if else结构)

public class Text01{
    public static void main(String args[]){
        int score = -1;
        if(score>85&&score<=100){
            System.out.print("A");
        }
        else if(score>75&&score<=85){
            System.out.print("B");
        }
        else if(score>60&&score<=75){
            System.out.print("C");
        }
        else if(score<=60&&score>=0){
            System.out.print("D");
        }
        else {
            System.out.print("buzhengchang");
        }
        
    }
}

2.打印出100-200之间所有的素数

 1 public class Text02{
 2     public static void main(String args[]){
 3         for(int i=100;i<=200;i++){
 4         boolean b = false;
 5             for(int j=2;j<=i-1;j++){
 6                 int k =i%j;
 7                 if(k==0){
 8                     b=true;
 9                 }
10             }
11             if(!b){
12                 System.out.print(i +"
");
13             }
14         }
15     }
16 }