What is modular programming?

An approach to organizing a program, where it is divided into independent, functionally complete parts (modules). Each module solves a specific task and has a clear interface for interaction with other modules.

Advantages:

• Code reuse: Modules can be used in different projects or parts of the same project.
• Ease of debugging: Easier to find and fix errors in small, isolated modules.
• Improved readability and maintainability: The code becomes more structured and understandable.
• Parallel development: Multiple developers can work on different modules simultaneously.

In Python, modules are implemented as .py files. Importing modules is done using the import keyword.

# module1.py
def greet(name):
    print(f"Hello, {name}!")

# main.py
import module1

module1.greet("World")