From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2012-09-19T00:08:16+09:00
Subject: Re: FloatDomainError while rounding

On Tue, Sep 18, 2012 at 4:23 PM, raj g. <lists@ruby-forum.com> wrote:
> Yes I have printed @den1 and @den2 but both of them are not same. even
> than I face the same problem when I tried to round @answer.
>
>    If I print @answer without rounding I am not getting the error and
> getting a Number with long floating point Which is not required for me.

OK. Let's simplify. Can you show the minimal piece of code that
produces the error. Like:

a = ?
b = ?
coeff = [?,?]
num = ?

den1 = coeff.first * Math::log10(a)
den2 = coeff.last * Math::log10(b)
p den1
p den2
answer = num/(den1-den2)
p answer
answer = (answer*100).round/100.to_f

Can you assign some example values to the variables (where I placed
the ?) from your program, run this and show us the output?
BTW, I'm not sure you need instance variables (variables starting with
@). Unless you are actually inside an instance of a class and you need
to keep all those values around.

Jesus.