数组
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<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script>
var arr=new Array(5);
// 创建一个长度为5的数组
// 数组的索引值是从零开始
// arr[索引值]：数组中对应的储存空间
arr[0]=10;
arr[1]=20;
arr[2]=30;
arr[3]=40;
arr[4]=50;
console.log(arr);
var arr=[10,20,30,40,50]
console.log(arr);
// 更改数组中的值
arr[2]=38;
console.log(arr);
</script>
</body>
</html>
复制代码#遍历数组
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script>
var arr=[10,20,30,40,50];
for(var n=0;n<arr.length;n++){
document.write(arr[n]+"<br>");
}
</script>
</body>
</html>
复制代码字符数组
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<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<ul id=nav>
</ul>
<script>
var arr=["百度","腾讯","阿里","京东"];
var str="";
for(var n=0;n<arr.length;n++){
str=str+"<li>"+arr[n]+"</li>";
}
var nav=document.getElementById("nav");
nav.innerHTML=str;
</script>
</body>
</html>
复制代码© 版权声明
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