<!DOCTYPE html><html lang="en"><head> ???<meta charset="UTF-8"> ???<title>Title</title></head><body>//js中有两种for循环//第一种循环的是下标和key<script> ???var a=[11,22,33,44] ???for (var item in a){ ???????//循环的是a的索引 ??????console.log(a[item]) ???} ???//循环字典操作 ???var b={"k1":"v1","k2":"v2",} ???for (var item in b){ ??????console.log(b[item]) ???}</script>//for循环产生下标 不支持字典操作<script> ???var a=[11,22,33,44] ???for (var i =0;i<a.length;i++){ ???????console.log(a[i]) ???}</script></body></html>
js之循环语句
原文地址：https://www.cnblogs.com/randomlee/p/9720940.html