Another alternative is putting the code in a function and calling that function.

    function test()
        s = 0

        for i = 1:10
           t = s + i
           s = t
           println("$s")
        end

        println("$s")
    end

    test()

For anyone curious, the rationale for this scoping is explained in the docs. Essentially it's to prevent the so-called spooky action at distance.