guess_the_number.rb

class GuessTheNumber

  def play
    @nnn = 1.upto(100).to_a.sample
    # play game
    puts "Alright, I have a number in mind from 1-100.  Pick a number."
    guess = gets.chomp
    puts "You said #{guess}."
    attempt guess
  end

  def play_again?
    response = ""
    puts "Do you want to play again? [y/n]"
    until response == "y" or response == "n"
      response = gets.chomp
    end
    #response == "y"
    response.eql? "y"
  end

  def attempt guess
    guess = guess.to_i

    if guess < @nnn
      puts "#{guess} is too low.  Try again:"
      new_guess = gets.chomp
      attempt new_guess
    elsif guess > @nnn
      puts "#{guess} is too high.  Try again:"
      new_guess = gets.chomp
      attempt new_guess
    elsif guess == @nnn
      puts "Yes, the answer is #{@nnn}. Aren't you proud of yourself?"
    end
  end
end

# main
g = GuessTheNumber.new
keep_playing = true
while keep_playing
  g.play
  keep_playing = g.play_again?
end

here's my previous version.

class GuessTheNumber
  def initialize
    @nnn = 1.upto(100).to_a.sample
    puts "Alright, I have a number in mind from 1-100.  Pick a number."
    guess = gets.chomp
    puts "You said #{guess}."
    attempt guess
  end

  def attempt guess
    guess = guess.to_i

    if guess < @nnn
      puts 'Your guess was too low.  Try again:'
      new_guess = gets.chomp
      attempt new_guess
    elsif guess > @nnn
      puts 'Your guess was too high.  Try again:'
      new_guess = gets.chomp
      attempt new_guess
    elsif guess == @nnn
      puts "Yes, the answer is #{@nnn}. Aren't you proud of yourself?"
    end
  end
end

g = GuessTheNumber.new