<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script src="../js/jquery-3.2.1.min.js"></script>
<script>
var a=[11,22,33];
//index,为数组当前遍历的数组的下标，elements为当前遍历到的数组元素
$.each(a,function (index,elements) {
console.log(elements);
})
//输出的a 为数组的下标
for(var aa in a){
console.log(a[aa]);
}
//obj对象
var obj={"name":"zhangsan","age":29}
//key为遍历到当前对象的key,value为当前key对应的值
$.each(obj,function (key,value) {
console.log(key+":"+value);
})
//输出的index 值为该对象的key值
for(var index in obj){
console.log(key+":"+obj[index]);
}
</script>
</head>
<body>
</body>
</html>