lovecoding
/
web0715


			
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							<!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>
        // 第一题
        var n = 13;
        function fn(n) {
            alert(n);//
            n = 14;
            alert(n);
        }
        fn(n);
        alert(n)

        // 第二题
        var n = 0;
        function a() {
            var n = 10;
            function b() {
                n++;
                alert(n);
            }
            b();
        }
        a();
        alert(n);

        // 第三题
        console.log(num, str);
        var num = 18;
        var str = "lily";
        function fn2() {
            console.log(str, num);
            num = 19;
            str = "candy";
            var num = 14;
            console.log(str, num);
        }
        fn2();
        console.log(str, num);

        // 第四题
        fn();
        function fn() { console.log(1) };
        fn();
        var fn = 13;
        fn();
        function fn() { console.log(2) };
        fn();

        // 第五题
        (function f() {
            function f() { console.log(1) };
            f();
            function f() { console.log(2) };
        })();

        // 第六题
        if (!("a" in window)) {
            var a = 10;
        }
        alert(a);
        console.log(fn);
        if (9 == 8) {
            function fn() {
                alert(2);
            }
        }
        
        // 第七题
        function fn() {
            var i = 5;
            return function (n) {
                console.log(n * i++);
            }
        }
        var f = fn();
        f(4);
        fn()(5);
        f(6);


    </script>
</body>

</html>