s = "foobar"
s[0 .. 3]
    => "foo"
s[.. 3]
    => "foo"
s[2 .. 4]
    => "ob"
s[1 .. -1]
    => "ooba"
s[3 .. 6]
    => "bar"
s[3 ..]
    => "bar"
s[2 :: 2]
    => "ob"
s[3 :: 3]
    => "bar"
s[:: 2]
    => "fo"
s[1 :: -1]
    => ""

ob = #(a, b, c, d)
ob[1 .. -1]
    => #(b, c)
ob[:: 2]
    => #(a, b)
ob[2 ..]
    => #(c, d)
ob[1 :: -1]
    => #()
</pre>

<p>[.. n] is the same as [:: n] (both give the first n characters or values).</p>

<p><b>Note:</b> When using literal numbers, spaces are required aroun