note 33908 deleted from control-structures.while by didou
| From: | didou@php.net | Date: | Fri, 11 Jul 2003 08:05:54 +0000 |
| Subject: | note 33908 deleted from control-structures.while by didou | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-51885@lists.php.net to get a copy of this message | ||
Note Submitter: Merve
----
If you want to calculate powers, but you're having trouble with negative numbers and zero, use
this code. It's still not compatible with a decimal number as the power (I'm working on
that, but I doubt I'll ever be able to). All you have to do is include a bunch of if-then
statements, along with the while loop. For those of you unfamiliar with special characters =
is = and <sup> puts your stuff in superscript.
<?php
if ($b==0) {
print (" $a<sup>$b</sup> = 1");
}
elseif ($b<0) {
$c = $a;
$d = $b;
$f = ($b*-1);
while ($f>1)
{
$a = ($a*$c);
$f--;
}
$e = (1/$a);
print (" $c<sup>$d</sup> = $e");
} else {
$c = $a;
$d = $b;
while ($b>1)
{
$a = ($a*$c);
$b--;
}
print (" $c<sup>$d</sup> = $a");
}
}
?>
So, making your calculator will be a cinch.