On my computur, the expression .1 + .2 - .3 gives PERL VERSION RESULT 5.20.0 5.55111512312578e-17 6 version 2014.09 built on parrat 6.7.0, revision 0 0 I like Perl 6 better. See http://www.slideshare.net/Ovid/perl-6-for-mere-mortals for more information. -mark