Ruby N00by

What is wrong here?

puts 'What is your favourite number?'
fav_number = gets.chomp
better_number = fav_number.to_i + 1
puts 'A better favourite number would be, ' +better_number+ '!'

>>30
No, that's OK, since all the ruby blogs are currently down because of Rails 3 alpha bugs, deployment issues, and undocumented features.