What is the difference between instance and class variables in Ruby?

What is the difference between instance and class variables in Ruby?

In Ruby, instance variables are tied to a specific instance of a class, while class variables are shared among all instances of the class.

Can you give me an example of each?

Sure! An instance variable is defined with '@', like @name, and a class variable is defined with '@@', like @@count.

How do they behave differently when I modify them?

Modifying an instance variable affects only that instance, while modifying a class variable affects all instances of the class.

Are there any best practices for using these variables?

Yes, it's generally best to use instance variables for object-specific data and class variables for data that should be shared across all instances.