2.07 变量小练习
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script type="text/javascript">
var age=3+4;
document.write(age)
<!-- 输出结果是7-->
var name=prompt("请输入姓名");
<!--prompt输入的姓名会给变量赋值-->
document.write(name)
</script>
</head>
<body>
</body>
</html>
确认后：
