11_ for 练习 _ Math.sqrt

2023-02-26 12:04:03
<!DOCTYPE html>

<html>

    <head>

        <meta charset="utf-8" />

        <title>Is Prime Number? Better way.</title>

    </head>

    <body>

        <script type="text/javascript">

            var xNumber = +prompt("请输入一个大于1的数字：");

            var isPrimeNumber = true;

            if(xNumber>1 && xNumber != NaN)

            {

                for(i=2; i<Math.sqrt(xNumber); i++)

                {

                   if(xNumber%i==0)

                   {

                       isPrimeNumber = false;

                       break;

                   }

                }

            }

            if(isPrimeNumber)

            {

                document.write(xNumber+" is a Prime Number.");

            }

            else

            {

                document.write(xNumber+" is NOT a Prime Number.");

            }

        </script>

    </body>

</html>
码农公寓

相关文章
