16.break和continue.html

<!DOCTYPE html>
<html lang="zh">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script>
        for (var i = 2; i <= 100; i++) {

            //创建一个布尔值，用来保存结果，默认i是质数
            //Math.sqrt()对一个数开方
            var flag = true
            for (var j = 2; j <= Math.sqrt(i); j++) {
                if (i % j == 0) {
                    flag = false
                    break
                }

            }

            if (flag) {
                document.write(i + "<br/>")
            }
        }          
        /* 
            36
            1 12
            2 18
            3 12
            4 9
            6 6
         */
    </script>
</head>

<body>

</body>

</html>