I meant this: to check whether 2 floating point valuables equal I had
always had to do something like abs(x-y)<1.e-5 (never simply x==y) in
other languages. I wonder whether checking x==y would be sufficient in
Julia?
On 2014年11月05日 09:30, Stefan Karpinski wrote:
On Wed, Nov 5, 2014 at 2:06 AM, K Leo <cnbiz...@gmail.com
<mailto:cnbiz...@gmail.com>> wrote:
julia> 2*10.97 + 23.9985
45.938500000000005
julia> 2*10.97 + 23.9985 == 45.938500000000005
true
Amazing. I never expected this. Is floating point comparison
going to be guaranteed?
What's shocking about this? What do you mean by floating point
comparison being guaranteed? We always print individual floating-point
numbers with enough digits to reconstruct their exact value (moreover,
they are always printed with the minimal number of digits necessary to
do so). Floating-point arrays are printed truncated.
