🐍 Day 14: Exception Handling in Python

 📌 Introduction

In real-world applications, things don’t always go as expected. A file might be missing, users might enter invalid input, or a network call may fail. Python provides exception handling to manage such unexpected events gracefully — without crashing the program.

                                            

💥 What is an Exception?

An exception is an error that occurs during the execution of a program, disrupting its normal flow.

✅ Why Use Exception Handling?

• To avoid abrupt crashes

• To provide meaningful error messages

• To handle different errors specifically

• To improve user experience

🔁 try-except Block

                        Syntax:

        

Example:

                                     

🔄 else and finally Blocks

• else: Runs if no exception occurs

• finally: Runs no matter what (good for clean-up)

                                        
                                      

🚨 The raise Keyword

Use raise to manually trigger an exception.

                                    

🧑‍💻 Custom Exceptions

You can define custom exceptions using classes that inherit from Python’s Exception class.

                                      

🧠 Summary

• try-except helps catch and handle errors.

• else runs when no error occurs.

• finally always runs — perfect for cleanup.

• raise lets you manually throw errors.

• Custom exceptions make your code cleaner and more specific.

Keep this in Mind:

            "Errors should never pass silently. Unless explicitly silenced."

— The Zen of Python (PEP 20)