Object-Oriented Programming (OOP) is a programming concept based on objects and classes.<\/p>\n\n\n\n
It is used to organize code into reusable and structured components.<\/p>\n\n\n\n
In simple words:
OOP allows you to model real-world things (like a car, student, bank account) into code.<\/p>\n\n\n\n
There are four main principles of OOP:<\/p>\n\n\n\n
A class is a blueprint for creating objects.<\/p>\n\n\n\n
Example:<\/p>\n\n\n\n
class Student:
pass<\/pre>\n\n\n\n2. OBJECT<\/strong><\/h2>\n\n\n\n
An object is an instance of a class.<\/p>\n\n\n\n
class Student:
passs1 = Student()
print(type(s1))<\/pre>\n\n\n\nHere,
s1<\/code> is an object of theStudent<\/code> class.<\/p>\n\n\n\nREAL-WORLD EXAMPLE<\/strong><\/h2>\n\n\n\n
Think of a class as a blueprint of a house.
An object is the actual house built from that blueprint.<\/p>\n\n\n\nWHY USE OOP?<\/strong><\/h2>\n\n\n\n
\u2022 Organizes large programs
\u2022 Makes code reusable
\u2022 Improves readability
\u2022 Helps manage complex projects
\u2022 Used in real-world applications<\/p>\n\n\n\nSIMPLE EXAMPLE WITH ATTRIBUTES<\/strong><\/h2>\n\n\n\n
class Student:
def __init__(self, name, age):
self.name = name
self.age = ages1 = Student(\"Hira\", 22)print(s1.name)
print(s1.age)<\/pre>\n\n\n\nHere:<\/p>\n\n\n\n
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__init__<\/code> is a constructor<\/li>\n\n\n\nself<\/code> refers to the current object<\/li>\n\n\n\nname<\/code> andage<\/code> are attributes<\/li>\n<\/ul>\n\n\n\nEXAMPLE WITH METHODS<\/strong><\/h2>\n\n\n\n
class Student:
def __init__(self, name):
self.name = name def greet(self):
print(\"Hello, my name is\", self.name)s1 = Student(\"Ali\")
s1.greet()<\/pre>\n\n\n\nMethods are functions inside a class.<\/p>\n\n\n\n
OOP VS PROCEDURAL PROGRAMMING<\/strong><\/h2>\n\n\n\n
Procedural<\/th> OOP<\/th><\/tr><\/thead> Uses functions<\/td> Uses classes & objects<\/td><\/tr> Less structured for big projects<\/td> Highly structured<\/td><\/tr> Harder to maintain large systems<\/td> Easier to manage large systems<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n WHERE OOP IS USED<\/strong><\/h2>\n\n\n\n
\u2022 Web development
\u2022 Game development
\u2022 Desktop applications
\u2022 Mobile apps
\u2022 Enterprise software<\/p>\n\n\n\nKEY TAKEAWAY<\/strong><\/h2>\n\n\n\n
OOP is a programming approach that uses classes and objects to structure code in a clear, reusable, and real-world manner.<\/p>\n\n\n\n
It is one of the most important concepts in Python and modern programming.<\/p>\n\n\n