变量/变量赋值/变量类型
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<script type="text/javascript">
var name = "张三";
var age = 12;
var sex = "男";
var hobby = new Array("basketball" , "football" , "volleyball");
document.write(name);
document.write(age);
document.write(hobby);
</script>
</body>
</html>