A quiet-or-signalling NaN (bit pattern 0x7FBFFFFF) as a float. It compares unequal to every value including itself; test for it with isnan, not ==.
FLOAT32_NAN :: 0h7FBFFFFFA quiet-or-signalling NaN (bit pattern 0x7FBFFFFF) as a float. It compares unequal to every value including itself; test for it with isnan, not ==.
FLOAT32_NAN :: 0h7FBFFFFF