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

Signbit_sub() Sub Signbit_sub ( Ret As  Boolean, X As  Double  ) Determine sign of number (Subroutine version) Purpose Determines the sign of the given number. Parameters [out] Ret If X is negative, True is returned. Otherwise, False is returned. [in] X Argument to be examined.