## Adivinador
```ruby
puts "Adivina el numero"
secret_number = rand(10)
guess = 0
while guess != secret_number
  guess = rand(10)
puts "Guess is #{guess}"
if guess == secret_number
  puts "You win!"
else
  puts "Guess again!"
end
end
```
## Consonante o Vocal
```ruby
puts "Escriba un mensaje:"
message = gets.chomp
vocales = ['a','e','i','o','u']
if message[-1] == "a" || message[-1] == "e" || message[-1] == "i" || message[-1] == "o" || message[-1] == "u"
  puts "VOCAL!"
elsif message[-1] == "y"
  puts "NO LO SE!"
else
  puts "CONSONANTE!"
end
```
## Par o Impar
```ruby
puts "Escriba un mensaje:"
message = gets.chomp
if message.length % 2 == 0;
  puts "PAR"
else
  puts "IMPAR"
end
```
## Even or Odd
```ruby
5.times do |i|
  if i % 2 == 0
  puts "Line is even"
else
  puts "Line is odd"
end
end
```