last

        # Range.last

(from ruby core)
---
    last -> object
    last(n) -> array

---

With no argument, returns the last element of `self`, if it exists:

    (1..4).last     # => 4
    ('a'..'d').last # => "d"

Note that `last` with no argument returns the end element of `self` even
if #exclude_end? is `true`:

    (1...4).last     # => 4
    ('a'...'d').last # => "d"

With non-negative integer argument `n` given, returns the last `n`
elements in an array:

    (1..10).last(3) # => [8, 9, 10]
    (1..10).last(0) # => []
    (1..4).last(50) # => [1, 2, 3, 4]

Note that `last` with argument does not return the end element of `self`
if #exclude_end? it `true`:

    (1...4).last(3)     # => [1, 2, 3]
    ('a'...'d').last(3) # => ["a", "b", "c"]

Raises an exception if there is no last element:

    (1..).last # Raises RangeError