why is the default floating point value NAN ?

[Adam D. Ruppe]

On Wednesday, 17 October 2018 at 15:48:16 UTC, Codifies wrote:
> I'd have thought it ought to be 0.0 ?
>
> So far I seen carefully considered and sensible reasons for 
> doing things in D, so why NAN ?

You are supposed to initialize your own variables explicitly. NaN 
is a somewhat easy way to indicate that you forgot to do that.