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4-3变量的作用域.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>变量的作用域练习题</title>
    <script>
        var name = "a";
        console.log(name);
        function f2() {
            console.log(name);
        }
        f2();
        function f1() {
            var a;
            a = b = c = 9;
            console.log('a' + a);
            console.log('b' + b);
            console.log('c' + c);
        }
        f1();
        console.log('cc' + c);
        console.log('bb' + b);
        console.log('aa' + a);
    </script>
</head>

<body>
</body>

</html>