64、作用域

2024-10-04 / 0 评论 / 4 阅读 / 正在检测是否收录...

10/04

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        let num = 10
        console.log(num) //全局变量

        function fn(){
            console.log(num)
        }
        fn()

        // 2、局部变量 //函数变量
        function fun(){
            let str = 'pink'
            console.log(str)
        }
        fun()
        // 写外面会错误    
    </script>
</body>
</html>

JavaScript