Subject: Re: best CL type for fixed decimal values From: Erik Naggum <erik@naggum.no> Date: 2000/03/03 Newsgroups: comp.lang.lisp Message-ID: <3161081269457609@naggum.no> * Marc Battyani | What CL types are best suited for computing with fixed decimal values with | exactly n places after the decimal point? | | I can use | floats with a special rounding after each operation * Johan Kullstam <kullstam@ne.mediaone.net> | floats are out since finite length decimal point numbers often have | non-finite binary expansions. 0.1 for example cannot be represented | exactly by floating point. but if he knows he has N places after the decimal point, that translates directly to a factor (expt 10 N), which means he could do well with the extra precision and speed of a double-float value relative to bignums. #:Erik