Dunder methods for representing objects

• __str__: The string representation method. It is called when the str() or print() function are called on an object. (Similar to toString() in Java and other languages.) It is meant to be human-readable, aimed at the end-user.
• __repr__: The object representation method. It is called when the repr() function is called on an object. It is meant to be unambiguous, aimed at the developer. (Useful for debugging.)