varietyOfLoop.rb

[1, 2, 3].each do |e|
  puts e # 1 2 3
end

'abc'.chars do |c|
  puts c # a b c
end

5.times do |t|
  puts t # 0 1 2 3 4
end

5.upto(8) do |u|
  puts u # 5 6 7 8
end

5.downto(2) do |d|
  puts d # 5 4 3 2
end

2.4.step(5.8, 0.8) do |s|
  puts s # 2.4 3.2 4.0 4.8 5.6
end