JS 运算符

 1 <!DOCTYPE html>
 2 <html>
 3     <head>
 4         <meta charset="UTF-8">
 5         <title></title>
 6     </head>
 7     <body>    
 8     </body>
 9     <script type="text/javascript">
10     //算术运算符 + - * /  %
11         var result = 5*(2 + 4);
12         alert(result);
13 
14     //在 js 里面除数为0，并不会报错
15         var result = 5 / 0;
16         alert(result);
17     //取余
18         //5 % 13  只要大于5，余数都为5
19         //5 % 6   余数为5
20         //5 % 2   余数为1
21         //5 % 5   余数为0
22         var result = 5 % 13;
23         alert(result);
24 
25     //比较运算符号  > >= < <= != ==
26         var number1 = 5;
27         var number2 = 3;
28     //true
29         var result1 = number1 >= number2; 
30 
31 
32     //true
33         var result2 = number1 != number2;
34 
35 
36     //false
37         var result3 = number1 == number2;    
38 
39     // 优先级： 算术运算符>比较运算符>赋值运算符
40         var result = number1 < number2 + 10;
41         alert(result);
42     
43     </script>
44     
45 </html>