What are instance variables in Ruby?

What are instance variables in Ruby?

Instance variables in Ruby are variables that are tied to a specific instance of a class. They are prefixed with an '@' symbol.

Can you give me an example of how to use instance variables?

Sure! Here's a simple example:

class Dog
  def initialize(name)
    @name = name
  end

  def bark
    "Woof! My name is #{@name}."
  end
end

my_dog = Dog.new('Buddy')
puts my_dog.bark  # Output: Woof! My name is Buddy.

What is the difference between instance variables and class variables?

Instance variables belong to a specific instance of a class, while class variables (prefixed with '@@') are shared across all instances of the class.

Are instance variables accessible outside the class?

No, instance variables are private to the instance and cannot be accessed directly from outside the class. You can use getter methods to access them.