fizzbuzz.rb

def fizzbuzz_output(number)
  result = ""
  result << "Fizz" if number % 3 == 0
  result << "Buzz" if number % 5 == 0
  result = number if result.empty?
  result
end

def fizzbuzz(a,b)
  a.upto(b) do |number|
      puts fizzbuzz_output(number)
    end
end

puts "Insert starting number:"
starting = gets.chomp.to_i

puts "Insert ending number:"
ending = gets.chomp.to_i

fizzbuzz(starting,ending)