note 51460 added to function.sqrt

Just a note to say you can take the square root of a negative number - it returns an imaginary number. One might do it like this //take initial value of $x $abs_x = abs($x); $answer = sqrt($abs_x); echo $answer; if ($x < 0) echo"<b><i>i</i></b>"; ---- Manual Page -- http://www.php.net/manual/en/function.sqrt.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+51460 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+51460&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+51460&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+51460&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+51460&report=yes&reason=useless Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+51460&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+51460&report=yes Search -- http://master.php.net/manage/user-notes.php