Add arrays



examples/arrays/add.cr
x = [2, 3, 4]
y = [5, 6, 7]
p! x
p! y
z = x + y
p! z

x # => [2, 3, 4]
y # => [5, 6, 7]
z # => [2, 3, 4, 5, 6, 7]