Converting floats to ints with intval

I've got the following script which demonstrates a problem I'm having with floating point numbers and intval: $times100 = (-37.12 * 100); print $times100 . "\n"; $intval100 = intval($times100); print $intval100 . "\n"; print ($intval100 / 100) . "\n"; I expect the output to be: -3712 -3712 -37.12 However, the actual output I'm getting (on several systems, so it's not just my machine) is: -3712 -3711 -37.11 Is there a reason for this, and a better way I should be doing it? Basically I need to add up a list of floats, representing currency values, and see if they're equal to another float, but I need to convert them to ints first because I can't guarantee than there won't be something after the second decimal place. Thanks, Paul -- Paul Waring http://www.pwaring.com