Variable Access

class A
  # Allow read access to var
  attr_reader :var
  
  # Set the INSTANCE variable var
  def set
    @var = "I am an instance variable"
  end
    
  # Print the LOCAL variable
  def show
    puts var
  end
  
end

# Create a new INSTANCE of Access
a = A.new

# Print the LOCAL variable
a.show
# => nil

# Set the instance variable
a.set

# Print the LOCAL variable again
a.show
# => I am an instance variable