The range! datatype.
w> type? 2-5
== range!
w> block: [a b c d e f g]
== [a b c d e f g]
w> block/2-5
== [b c d e]
w> block/4-4
== [d]
w> block/4-3
== [c]
w> block/4-1
== [a b c]
Another useful shortcut:
w> a: [2.4 3.1 4.2 2.8 6.3 3.0 4.8]
== [2.4 3.1 4.2 2.8 6.3 3.0 4.8]
w> a > 4.1
== [4.2 6.3 4.8]
