From: Nicholas Rahn <nick@...>
Date: 2005-11-28T07:41:54+09:00
Subject: floating point subtraction question

Hi,

I'm a bit confused with some simple floating point arithmetic:

% ruby -e 'puts "#{(1.2 - 1.0) == 0.2}"'
false

% ruby -e 'puts "#{(1.5 - 1.0) == 0.5}"'
true

I'm sure there's a perfectly logical reason for this, but i think i've
been staring at it for too long to see what it is.

Can anyone shed some light on this?

Thanks for your help,
Nick

ps:
% ruby -v
ruby 1.8.3 (2005-06-23) [i486-linux]