OpenEuphoria

Re: I Need Help

• Posted by Michael Bolin <michaeltom at GEOCITIES.COM> Jun 21, 1997
• 936 views

> There's a simple explanation for why you aren't getting the
> results that you expect. The root of the problem is
> that 0.1 cannot be represented in binary floating-point
> form *exactly*. This means that if you add up ten 0.1's
> you will *not* get 1.
>
> Try the following statement in Euphoria:
> ? .1 + .1 + .1 + .1 + .1 + .1 + .1 + .1 + .1 + .1 - 1
>
> You will not get 0. You will get -1.11e-016.
> in other words a very very small number.

Here is a routine that will correct such errors up to 15 decimal
places:

function round(atom x)
    return floor(x*1e15+0.5)/1e15
end function

Maybe this will be useful to someone.

Regards,
               Michael Bolin