EDIT:<offtopic>That's an ambiguous test because n=n+1 also returns true for positive and negative infinity and very large (+ or -) values of n.</offtopic>
If Blitz3D's floating point support was correct, you could still test for NaN - and with the standard test of n<>n as described by my Wikipedia quote above.
If Blitz3D's floating point support was correct, you could still test for NaN - and with the standard test of n<>n as described by my Wikipedia quote above.