def fib(n)
  return n if n < 2
  vals = [0, 1]
  (n-1).times do
    vals.push(vals[-1] + vals[-2])
  end
  return vals.last
end

puts "\n enter a number to calculate the Fibonacci sequence"
num = gets.chomp.to_i

puts "do you want your digits in integer form or float form? type ( i / f )"

answer = gets.chomp

if answer == "i"
  then
  num.times do |i|
    puts fib(i)
  end

elsif answer == "f"
  then
  num.times do |f|
      puts fib(f)
    end

end