Re: 2 errors I can not understand

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I think you have an issue with the line 

while($d<$s) when it comes to the number 3.

$d will NEVER be < $s if $s = 3.

I think you want $d<=$s??  Or maybe a switch for the number 3?

----- Original Message ----
From: Jonathan Kahan <jonathan@xxxxxxxxxxxxxx>
To: php Lists <php-general@xxxxxxxxxxxxx>
Sent: Tuesday, March 13, 2007 4:30:45 PM
Subject:  2 errors I can not understand

Hi all,

Please see my output  below followed by the code. I have been trying for 
some to figure out why

1) I can not get a line feed to work in the web page that i am using to 
display the output as I am not running from the commad line

2) Why my loop is only executing 3 times when i want it to execute 50

Any help would be greatly appreciated.

Jonathan

The next line is all that displays on the output html page:

Output: The number 0 is 0 The number 1 is 0 The number 2 is 1 The number 3 
is 1

php script:

<html>
<body>
<?php
for ($k=0;$k<50;$k++)
{
echo ("The number ".$k." is ".isprime($k));
echo "\r\n";
}

function isprime ($s)
{
$a="2";

                switch ($s)
                {
                case "0":
                $a="0"; break;
                case "1":
                $a="0"; break;
                case "2":
                $a="1"; break;
                default:
                $d=3;
                        while ($d<$s)
                        {
                                if ($s%$d=0)
                                {
                                $a="0";
                                }
                        $d+=2;
                        }
                }

                if ($a=="2")
                {
                $a="1";
                }
return $a;
}
?>
</body>
</html>

"tjon2.php" 78L, 447C written

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