while和do while

 1 <!DOCTYPE html>
 2 <html>
 3 <head lang="en">
 4     <meta charset="UTF-8">
 5     <title></title>
 6 </head>
 7 <body>
 8 <script>
 9 
10     //求和演示
11     var sumWhile = 0;
12     var i=1;
13     while(i<=100){
14         sumWhile += i;
15         i++;
16     }
17     console.log(sumWhile);
18 
19 
20     var j = 1;
21     var sumDoWhile = 0;
22     do{
23         sumDoWhile += j;
24         j++;
25     }while(j<0);
26 
27     console.log(sumDoWhile);
28 </script>
29 </body>
30 </html>

posted on 2019-01-08 12:22 冰冰点灯阅读(542) 评论(0) 编辑收藏举报