vector subscript of an array

Hi,

Could you explain the difference between the two calls?

The first call changes the expected values ​​while the second provides zero.

Thanks,

Pierre

    module essai

    

    contains

        subroutine testarray(array)

            real(4),dimension(:) :: array

            array(:)=1      

        end subroutine      

    end module

    

    program moi

    

    use essai

    

    real(4), dimension(1,20), target :: array

    integer, dimension(2) :: part = (/1,4/)

   

    array=0

    call testarray(array(1,1:4:3))

    array=0

    call testarray(array(1,part))

    end program