Introduction to Modular Programming

What is Modular Programming?

Modular programming ka matlab hai humare code ko alag-alag files (modules) me split karna aur import karna, taaki hum reuse kar saken. Ye programs ko readable, scalable aur easy to maintain banata hai.

Python Module

Module typically ek Python file hoti hai jisme functions aur classes hote hain. Example: Python ka math module.

Example: Create your own module

Step 1: Ek file banaye mymodule.py:

# mymodule.py

def greet(name):
    return f"Hello {name}!"

def add(a, b):
    return a + b

Step 2: Import aur use karna in another file main.py:

# main.py

import mymodule

print(mymodule.greet("Amit"))
print(mymodule.add(10, 20))

Output:

Hello Amit!
30

Using from-import

# main.py
from mymodule import greet, add

print(greet("Ravi"))
print(add(5, 7))

Benefits of Modular Programming

Code reuse
Readable and maintainable code
Organized project structure
Easy to scale for large projects

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