Try & except

What is try and except?

In Python, we use try and except to handle errors without crashing the program.

It’s like saying:

“Try this code, and if there’s an error, except (catch) it and do something else.”

Basic Syntax:

try:
    # Code that may cause an error
    risky_code()
except:
    # Code to run if there is an error
    handle_error()

Example 1: Handling Division by Zero

try:
    result = 10 / 0
    print("Result:", result)
except:
    print("Oops! You can't divide by zero.")

Output:

Oops! You can't divide by zero.

Without try, this would crash your program!

Example 2: Catching a Specific Error

try:
    number = int(input("Enter a number: "))
    print("You entered:", number)
except ValueError:
    print("Please enter a valid number!")

What is else and finally?

The else block lets you execute code when there is no error.

The finally block lets you execute code, regardless of the result of the try- and except blocks.

Example 3: Using else and finally

try:
    x = int(input("Enter a number: "))
    print("You entered:", x)
except ValueError:
    print("Invalid number!")
else:
    print("Everything went fine!")
finally:
    print("This will always run.")

Parts:

• try: Code that may cause an error
• except: Runs if there is an error
• else: Runs if no error
• finally: Runs no matter what

Why Use try-except?

• Prevents your program from crashing
• Helps you handle user input errors
• Makes code more user-friendly