<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
<title>hello world</title>
</head>
<body>
<script type="text/javascript">
var array=[1,2,3,4,5];
for(var i in array){
alert(array[i]);//数组的元素
}
/*相当于：用for循环实现
for(var i=0;i<array.length;i++){
alert(array[i]);//数组的元素
}*/
</script>
</body>
</html>
时间： 2024-09-30 10:10:11