From: Todd Benson <caduceass@...>
Date: 2008-10-08T10:08:10+09:00
Subject: Re: newbie question

On Tue, Oct 7, 2008 at 5:27 PM, Will <wrsh07@gmail.com> wrote:
> Greetings all, I think this is generally more a programming question than a
> ruby explicit one, however, I am wondering why this code yields 23,
> 0.999999999999979 instead of 23, 1.
>
> Any help would be great!
>
> i = 0
> while i <= 50
>  a = 37*i / 50
>  c = a + 0.0
>  b = (37*i/50.0 - c ) *50
>  if b < 1.5 && b > 0.5
>    puts i
>    puts b
>  end
>  i = i+1
> end

require 'bigdecimal'

#put a bigdecimal in the numerator or denominator...
((BigDecimal("37") * 23 / 50 - 17) * 50).to_f
#=> 1.0

Todd