D1num D1num_sub IsFinite IsFinite_sub IsInf IsInf_sub IsNan IsNan_sub IsNormal IsNormal_sub Signbit Signbit_sub

IsNormal_sub() Sub IsNormal_sub ( Ret As  Boolean, X As  Double  ) Determine if normal number (Subroutine version) Purpose Determines if the given argument is normal number. Parameters [out] Ret If X is the normal number, True is returned. Otherwise, False is returned. Also False is returned for 0, infinite and NaN values. [in] X Argument to be examined.