a = [1,2] -- or: a = list(1,2)
put a[2] -- or: put a.getAt(2)
-- 2
a.append(3)
put a
-- [1, 2, 3]
a.deleteAt(2)
put a
-- [1, 3]
a[1] = 5 -- or: a.setAt(1, 5)
put a
-- [5, 3]
a.sort()
put a
-- [3, 5]