Coq < Compute 0.1.
Toplevel input, characters 8-11:
> Compute 0.1.
> ^^^
Warning: The constant 0.1 is not a binary64 floating-point value. A closest
value 0x1.999999999999ap-4 will be used and unambiguously printed
0.10000000000000001. [inexact-float,parsing]
= 0.10000000000000001
: float
See also: https://github.com/purerl/purerl, an Erlang backend for PureScript, which is a lot more mature but unfortunately doesn't get the attention it deserves.