On Matlab R2013b: >> 2*10.97 + 23.9985 ans = 45.9385 >> 2*10.97 + 23.9985 == 45.9385 ans = 0 >>
-- mb On Tue, Nov 4, 2014 at 7:48 PM, Stefan Karpinski <ste...@karpinski.org> wrote: > Some systems round their answers as John said but it's easy to check that > it's a lie: > > R version 3.1.0 (2014-04-10) -- "Spring Dance" > > 2*10.97 + 23.9985 > [1] 45.9385 > > 2*10.97 + 23.9985 == 45.9385 > [1] FALSE > > This is perl 5, version 16, subversion 2 (v5.16.2) > DB<1> x 2*10.97 + 23.9985 > 0 45.9385 > DB<2> x 2*10.97 + 23.9985 == 45.9385 > 0 '' > > > I don't have a working copy of Matlab right now, but I think it does this > too. > > On Tue, Nov 4, 2014 at 8:31 PM, Neil Devadasan <ndeva...@gmail.com> wrote: > >> Thanks >> >> On Tuesday, November 4, 2014 2:13:37 PM UTC-5, John Myles White wrote: >>> >>> Hi Neil, >>> >>> Julie does math the same way that all computers do math. You're probably >>> coming from another language where a lot of effort is invested into >>> pretending that computers offer a closer approximation to abstract >>> mathematics than they actually do. Those systems have been lying to you. >>> >>> Put another way: you just took the red pill by using Julia. >>> >>> -- John >>> >>> On Nov 4, 2014, at 11:06 AM, Neil Devadasan <ndev...@gmail.com> wrote: >>> >>> > julia> f(x::Float64, y::Float64) = 2x + y; >>> > >>> > julia> f(10.97,23.9985) >>> > 45.938500000000005 >>> > >>> > The above method execution of function f returns an answer that I >>> cannot understand. Can someone clarify? >>> > >>> > Thank you. >>> >>> >