[1, 2, 3].each { |i| puts i }

[1, 2, 3].each do |i|
  if i % 2 == 0
    puts "#{i} is even."
  else
    puts "#{i} is odd."
  end
end

1.upto 3 do |x|
  puts x
end

1.upto(3) { |x| puts x }