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

IsFinite_sub() Sub IsFinite_sub ( Ret As  Boolean, X As  Double  ) Determine if finite value (Subroutine version) Purpose Determines if the given argument has finite value, i.e. it is not infinite nor NaN (Not-a-Number). Parameters [out] Ret If X has finite value, True is returned. Otherwise, False is returned. The subnormal value is regarded as finite. [in] X Argument to be examined.