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Scalar values are always named with '$', even when referring to a scal
+ar that is part of an array. It works like the English word ``the''. 
+Thus we have:

    $days               # the simple scalar value "days"
...
    @days               # ($days[0], $days[1],... $days[n])
    @days[3,4,5]        # same as @days[3..5]
    @days{'a','c'}      # same as ($days{'a'},$days{'c'})