price_is_right.rb

# Setting min and max was a condition for making the
# game play by itself.
min_guess = 1
max_guess = 1_000

# Getting a random price that the player can try to guess.
price = rand(min_guess..max_guess)

# Starting a guesses counter, which will be incremented after
# each guess
guesses_counter = 0

# Getting time before game plays out
start_time = Time.now

# loop is the simplest looping keyword from Ruby, it creates a virtually
# infinite loop. It only ever stops if it sees the word `break`. We're calling
# break if the player guesses correctly.
loop do
  # This is how we find the best guess, it's the average between the min and max guess.
  guess = (max_guess + min_guess) / 2

  # Incrementing the guesses count
  guesses_counter += 1


  if guess == price
    ## RIGHT guess
    puts "It was #{guess}!"
    break
  else
    ## WRONG guess
    if guess > price # if the guess was OVER the price
      max_guess = guess # the new MAX guess is what you guessed.
    else             # if the guess was UNDER the price
      min_guess = guess # the new MIN guess is what you guessed.
    end
    # By updating the min and max guess, we're also updating the next best
    # guess on line 30.
  end
end

# Get the time when we finished the game
end_time = Time.now

# Display how many guesses it took
puts "It took you #{guesses_counter} guesses!"
# Show how long, in seconds, it took for the program to guess correctly.
puts "It took you #{end_time - start_time} seconds"