# パラメーターにより出力を変える
## paramsが`:even`のとき偶数のみ表示する
## paramsが`:odd`のとき奇数のみを表示する
## それ以外は全部表示する
 
def show_numbers(params)
  list = %w(18 22 11 73 91 38 24 17)
  list.each do |element|
    case params
      when :even
        if element.to_i.even?
          puts element
        end
      when :odd
        if element.to_i.odd?
          puts element
        end
      else
        puts element
    end
  end
end
 
puts '#### :odd ####'
show_numbers(:odd)
puts '#### :even ####'
show_numbers(:even)
puts '#### :ohter ####'
show_numbers(:other)

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