基本运算符 

 1  2 
 3 public class Demo01 {
 4     public static void main(String[] args) {
 5         //二元运算
 6         //Ctrl + D：复制当前行到下一行
 7         int a = 10;
 8         int b = 20;
 9         int c = 25;
10         int d = 25;
11 
12         System.out.println(a+b);
13         System.out.println(a-b);
14         System.out.println(a*b);
15         System.out.println(a/(double)b);
16 
17 
18 //*********************************
19 
20         long a = 1212121212121212121L;
21         int  b = 123;
22         short c = 10;
23         byte d = 8;
24 
25         System.out.println(a+b+c+d);//Long
26         System.out.println(b+c+d);//int
27         System.out.println(c+d);//int
28 
29 
30 //***********************************
31 
32         //关系运算符返回的结果：正确，错误  布尔值
33 
34         int a = 10;
35         int b = 20;
36         int c = 21;
37 
38         //取余，模运算
39         System.out.println(c%a);// 1
40         System.out.println(a>b);
41         System.out.println(a<b);
42         System.out.println(a==b);
43         System.out.println(a!=b);
44     
45     }
46 }
47

 

posted @ 2021-02-22 17:06  浅小墨  阅读(61)  评论(0)    收藏  举报