break与continue 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>break与continue</title>
    <!-- 
        //break:当n=4时终止for循环
        //continue:当n=4时不执行代码块，在n=5时继续执行代码块
        for (var n=0;n<10;n++){
            if (n=4){
                break/continue;
            }
            document.write(n);//代码块
        }
     -->
</head>
<body>
    <script>
        var i;
        while (i!=123456){
            i=prompt("请输入密码");
        }
        while (i=123456){
                i=prompt("请再次输入密码")
                if (i!=123456){
                    continue;//跳过本次，继续下次循环
                }else if(i=123456){
                    alert("两次输入的密码一致");
                    break;//不再执行循环
                    }
            }
    </script>
</body>
</html>

 

posted on 2019-12-06 14:43  loongw  阅读(135)  评论(0)    收藏  举报

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