  nan
  Builtin Function



      SSyynnooppssiiss
        Return a NaN (Not a Number)

      SSyynnttaaxx
        nan ( )

      DDeessccrriippttiioonn
        Nan returns a NaN (Not a Number) according to IEEE-754. One way
        to determine if a variable contains a NaN is to test it against
        itself.


          NaN == NaN


     Should always return FALSE (0).


     SSeeee AAllssoo
        inf









































