Hi,

In message "[ruby-talk:03202] Nan and Infinity"
    on 00/06/08, Dave Thomas <Dave / thomases.com> writes:

|If the result of a floating point operation is Nan or one of the
|Infinities, is there any way to tell apart from converting the number
|to a string.
|
|Would Float#isNan? be useful?

I guess so.  I will add them to the Float class.

							matz.