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

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