<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
body {
font-family: "Microsoft YaHei", serif;
}
body, dl, dd, p, h1, h2, h3, h4, h5, h6 {
margin: 0;
}
ol, ul, li {
margin: 0;
padding: 0;
list-style: none;
}
img {
border: none
}
</style>
</head>
<body>
<div id="wrap"></div>
<script>
var a = 5;
function fn(){
var a = 10;
alert(a);
function b(){
a ++;
alert(a);
}
return b;
}
var c = fn();
c();
fn()();
c();
</script>
</body>
</html>
Python3Turtle