colors = ["red", "green", "blue"]


puts "With positive index: #{colors[0]}, #{colors[1]}, #{colors[2]}"

puts "With negative index: #{colors[-1]}, #{colors[-2]}, #{colors[-3]}"

puts "Number of items: #{colors.size}"

With positive index: red, green, blue 
With negative index: blue, green, red
Number of items: 3

colors = ["red", "green", "blue"]

colors.each_with_index do |color, i|
	puts "#{i + 1}:#{color}"
end

1:red
2:green
3:blue

Append to the end of the table

colors = ["red", "green", "blue"]

colors.push "orange"

index = colors.length

puts colors[index - 1]

orange

Insert at index

colors = ["red", "green", "blue"]

colors.insert 2, "pink"

puts colors.join "\n"

red
green
pink
blue

Remove

colors = ["red", "green", "blue"]

colors.drop 1 

puts colors.join "\n"

green
blue