Remove real type

[Walter Bright]

strtr wrote:
> abcd Wrote:
> 
>> On the other hand, being an engineer, I use the reals all the time
>> and want them to stay. I would use the max precision supported by
>> the cpu then fixed precision like double any day.
>> 
>> -sk
> 
> For me it's the exact opposite, reproducibility/portability is key.
> My problem with real is that I am always afraid my floats get
> upgraded to them internally somewhere/somehow.

With numerical work, I suggest getting the correct answer is preferable 
<g>. Having lots of bits makes it more likely you'll get the right 
answer. Yes, it is possible to get correct answers with low precision, 
but it requires an expert and the techniques are pretty advanced.