Class Basics

What is Object-Oriented Programming (OOP)?

Object-Oriented Programming is a programming paradigm that groups data and functions together into a single unit (object).

# Procedural Programming
user_name = "John Doe"
user_age = 25
user_email = "john@example.com"

def print_user_info(name, age, email):
    print(f"{name}, {age} years old, {email}")

print_user_info(user_name, user_age, user_email)

# Object-Oriented Programming
class User:
    def __init__(self, name, age, email):
        self.name = name
        self.age = age
        self.email = email

    def print_info(self):
        print(f"{self.name}, {self.age} years old, {self.email}")

user = User("John Doe", 25, "john@example.com")
user.print_info()

(Rest of the content is the same as the original Korean file, with minor language adjustments)

Next Steps

You've mastered the basics of classes!

Key Points:
✅ Class and instance concepts
✅ Initialization with __init__
✅ Instance methods and self
✅ Class variables vs instance variables
✅ @classmethod and @staticmethod
✅ Encapsulation and property

Next Step: Learn inheritance, polymorphism, and magic methods in Advanced OOP!