Simple addition

[Dan Bishop]

"Terry Reedy" <tjreedy at udel.edu> wrote in message news:<3OadnQovPKs4nqzdRVn-hQ at comcast.com>...
> "Piet van Oostrum" <piet at cs.uu.nl> wrote in message
> news:wzisi7b9nj.fsf at cs.uu.nl...
> > >>>>> Brian <pythonista_at_sbcglobal_dot_net at invalid.net> (B) wrote:
> > [repr(0.1) is ugly!]
> 
> > Unfortunately most C libraries only use the stupid algorithm which often
> > gives some useless digits.
> 
> They are not useless if you want more accuracy about what you have

Why not display the *exact* decimal representation,
"0.1000000000000000055511151231257827021181583404541015625"?

> and what you will get with further computation.
> Tracking error expansion is an
> important part of designing floating point calculations.

We're talking about human-readable representation, not calculations.