Free: Modern Programming- Object Oriented Programming...

class ShoppingCart: def (self): self._items = [] # private self._discount_rule = None

Example in Python (using convention) :

public class Animal public virtual void Speak() Console.WriteLine("???"); public class Dog : Animal public override void Speak() Console.WriteLine("Woof!"); public class Cat : Animal public override void Speak() Console.WriteLine("Meow!"); Modern programming- object oriented programming...

The shift toward OOP in modern programming—championed by languages like Java, Python, and C++—was driven by the need to manage increasingly massive codebases. While older procedural programming styles were efficient for simple tasks, they often became "spaghetti code" as projects grew. OOP solved this by creating modular, self-contained blocks of code that are easier to test and update. class ShoppingCart: def (self): self

: Reducing complexity by hiding implementation details and only showing essential features. Inheritance : Reducing complexity by hiding implementation details and

def apply(self, total): return total * (1 - self._percent / 100)