switch基本结构

    <script>
        //输入数字打印星期几
        var num = parseInt(prompt("请输入数字代表星期几"));
        switch(num){
            case 1:
                 console.log("星期一");
                 break;
            case 2:
                console.log("星期二");
                 break;
            case 3:
                 console.log("星期三");
                break;
            case 4:
                 console.log("星期四");
                 break;
            case 5:
                 console.log("星期五");
                 break;
            case 6:
                 console.log("星期六");
                 break;
            case 7:
                 console.log("星期天");
                 break;
            default:
                console.log("您的输入有误");
                break;
        }
    </script>