JavaScript-leaning/switch.html at master · LaderBen/JavaScript-leaning · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script>
        var name = 'ben';
        var sex = 'male';

        switch (sex) {
            case 'male':
                alert(name + '先生，你好');
                break;
            case 'female':
                alert(name + '女士，你好');
                break;
        }

        //判断单双数
        var a = 12;
        // if(a%2==0){
        //     alert('双数');
        // }else{
        //     alert('单数');
        // }
        a % 2 == 0 ? alert('双数') : alert('单数');

        //for循环的使用
        for (var i = 0; i < 5; i++) {
            if (i == 2) {
                break;//中断整个循环
                continue;//中断本次循环
            }
            alert(i);
        }
    </script>
</head>

<body>

</body>

</html>