stdlib_zscal Subroutine

     pure subroutine stdlib_zscal(n,za,zx,incx)
     !! ZSCAL scales a vector by a constant.
        ! -- reference blas level1 routine --
        ! -- reference blas is a software package provided by univ. of tennessee,    --
        ! -- univ. of california berkeley, univ. of colorado denver and nag ltd..--
           ! Scalar Arguments 
           complex(dp), intent(in) :: za
           integer(ilp), intent(in) :: incx, n
           ! Array Arguments 
           complex(dp), intent(inout) :: zx(*)
        ! =====================================================================
           ! Local Scalars 
           integer(ilp) :: i, nincx
           if (n<=0 .or. incx<=0) return
           if (incx==1) then
              ! code for increment equal to 1
              do i = 1,n
                 zx(i) = za*zx(i)
              end do
           else
              ! code for increment not equal to 1
              nincx = n*incx
              do i = 1,nincx,incx
                 zx(i) = za*zx(i)
              end do
           end if
           return
     end subroutine stdlib_zscal