Exercises from http://pragprog.com/titles/btlang/seven-languages-in-seven-weeks

number_guesser.rb

number = rand(10) + 1
correct = false

puts "Guess a number between 1 and 10."

until correct do
  guess = gets.to_i
  correct = guess.equal? number

  if correct
    puts "You win!"
  else
    puts "Guess lower!" if guess > number
    puts "Guess higher!" if guess < number
  end
end