Hands-On Activity

Python Programming For Beginners

Write a Program to Handle Division by Zero

Objective: Write a Python program that handles division by zero using exception handling.

Steps:

Prompt the user to enter two numbers.
Perform division and handle ZeroDivisionError.
Print the result or an error message.

python

try:
    numerator = float(input("Enter the numerator: "))
    denominator = float(input("Enter the denominator: "))
    result = numerator / denominator
    print(f"The result is {result}")
except ZeroDivisionError:
    print("Error: Cannot divide by zero")

Create Custom Exceptions for a Specific Scenario

Objective: Create custom exceptions to handle specific scenarios, such as invalid input.

Steps:

Define a custom exception class.
Write a function that raises the custom exception for invalid input.
Use a try-except block to handle the custom exception.

python

class InvalidInputError(Exception):
    pass

def validate_input(value):
    if not isinstance(value, int):
        raise InvalidInputError("Input must be an integer")

try:
    user_input = input("Enter an integer: ")
    validate_input(int(user_input))
    print("Valid input")
except InvalidInputError as e:
    print(e)  # Output: Input must be an integer
except ValueError:
    print("Error: Input must be an integer")