ceil() help

[leony]

Hi,

 

Can anybody tell me why the following code outputs different results:

 

<?
$number = 2.16/0.36;
echo "$number<br>";
echo ceil($number);
?>

Output:

6

7

 

 

[ignace]

haha funny i guess this is because the basic behavior in converting from float to integer is the removal of decimals (i.e. floor()) ceil() probably check if the variable contains decimals and converts to integer and adds 1

[Barand]

echo ceil(4/2);   // 2, as expected.

 

Floating point math rarely gives an exact value unless the fractional divisors are multiples of 2, (1/4, 3/4, 7/16, 23/128 etc) so if the result of your division is really 6.0000000000000001 then ceil() rounds up

 

[leony]

So what is the solution in this situation?

----------------

 

I think I have found it:

 

To use number_format()

<?
$number = 2.16/0.36;
$number = number_format($number,2);
echo "$number<br>";
echo ceil($number);
?>

[corbin]

Edit:  2 seconds after posting, I realized that my solution wouldn't work.