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

Signbit() Function Signbit ( X As  Double ) Determine sign of number Purpose Signbit determines the sign of the given number. Returns Boolean If X is negative, True is returned. Otherwise, False is returned. Parameters [in] X Argument to be examined.