check if two variable not equal in Ruby

unless x == y
  # Do something
end

This code checks if two variables, x and y, are not equal. Unless x and y have the same value, the code within the unless clause will be run. The code within the unless clause is usually a series of instructions, such as printing a message or making a comparison, that will be executed if x and y are not equal. In this case, the code within the unless clause is empty, meaning that nothing will happen if x and y are not equal. This code is useful if you want to check whether two variables have different values and make a decision based on that result.