1 <!DOCTYPE html>
2 <html lang="en">
3 <head>
4 <meta charset="UTF-8">
5 <meta name="viewport" content="width=device-width, initial-scale=1.0">
6 <title>Document</title>
7
8 <script>
9 /*
10 往浏览器窗口上打印
11 */
12 document.write("<h1>中国矿业大学<h1>")
13 document.write("<hr>")
14
15 /*
16 while for foreach
17 */
18 var arr = ["北京","上海","广州"]
19 document.write("<ul>")
20 /* 直接打印 index ，是数组中元素对应索引*/
21 for(var index in arr){
22 document.write("<li>"+arr[index]+"</li>")
23 }
24 document.write("</ul>")
25
26 </script>
27
28 </head>
29 <body>
30
31 </body>
32 </html>
标签：index,arr,05,write,循环,var,document,结构 From： https://www.cnblogs.com/IrVolcano/p/18074190