Printing a floats in maximum precision

[Nicholas Wilson via Digitalmars-d-learn]

On Wednesday, 18 January 2017 at 00:23:37 UTC, pineapple wrote:
> On Wednesday, 18 January 2017 at 00:09:42 UTC, Nordlöw wrote:
>> What's the easiest way to print a double in maximum precision?
>
> https://github.com/pineapplemachine/mach.d/blob/master/mach/text/numeric/floats.d#L60
>
> You can also try the formatting directive "%.20f" but unlike 
> the former I can't offer any guarantees of its accuracy (it's 
> probably accurate)

Alternatively use %a to print in hex to verify exact bit patterns.