nag_machine_precision (X02AJC) is a constant defined in the C Header file.
nag_machine_precision (X02AJC) returns machine precision
, computed as
is the arithmetic base (see nag_real_base (X02BHC)
is the number of significant base-
digits (see nag_real_base_digits (X02BJC)
It is important to note that the definition of
here differs from that in ISO (1997)