checking whether the number is NaN

[Zhenya]

On Friday, 28 December 2012 at 15:59:35 UTC, bearophile wrote:
> Zhenya:
>
>> Tell me please,are there any way to check whether number is 
>> NaN?
>
> http://dlang.org/phobos/std_math.html#isNaN
>
> Bye,
> bearophile

Thank you!