[Oberon] Modulus on negative number

[Skulski, Wojciech]

Joerg:

>> 1. Does Oberon support NaN? If not then maybe it should?
>> 2. Could the "undefined" become "defined as NaN" in all numerical cases which are now undefined?

>„NaN“ is a special value for floating point numbers defined in IEEE 754. In Oberon, DIV and MOD are defined on positive INTEGERs. Hence, no "NaN".

This is why I said "somewhat related". I understand the integer case, but how about the floating point? 

Do the NaNs depend on the hardware support? Is it wise to specify them in the language?

Wojtek