What are the different visibility levels for methods in Ruby?

What are the different visibility levels for methods in Ruby?

In Ruby, there are three visibility levels for methods: public, protected, and private. Public methods can be called by anyone, protected methods can only be called within the class and its subclasses, and private methods can only be called within the class itself.

Can you give me an example of each visibility level?

Sure! Here's an example:

class Example
  def public_method
    'I am public'
  end

  protected
  def protected_method
    'I am protected'
  end

  private
  def private_method
    'I am private'
  end
end

How do I call a private method from within the class?

You can call a private method from within another method of the same class. For example:

class Example
  def call_private
    private_method
  end
end

What happens if I try to call a private method from outside the class?

If you try to call a private method from outside the class, you'll get a NoMethodError because private methods cannot be accessed directly.