Error Handling in Python: A Beginner’s Guide with Examples

Error Handling in Python

1. What are Exceptions?
 An exception is an error that occurs during program execution. When an
exception is raised, it disrupts the normal flow of the program.
 Common exceptions include ZeroDivisionError, ValueError, TypeError, and
FileNotFoundError.

Example of an Exception:

print() # Raises ZeroDivisionError


2. Handling Exceptions with try-except
 Use a try-except block to catch exceptions and prevent program crashes.

Syntax:

try:
# Code that might raise an exception
risky_code()
except ExceptionType:
# Code to handle the exception
handle_error()

Example:

try:
result =
except ZeroDivisionError:
print("Cannot divide by zero!")

Output:

, csharp
Cannot divide by zero!


3. Handling Multiple Exceptions
 You can handle different types of exceptions with separate except blocks.

Example:

try:
value = int(input("Enter a number: "))
print(10 / value)
except ValueError:
print("Invalid input! Please enter a valid number.")
except ZeroDivisionError:
print("Cannot divide by zero!")


4. Using else with try-except
 The else block runs if no exception occurs in the try block.

Example:

try:
value = int(input("Enter a number: "))
except ValueError:
print("Invalid input!")
else:
print(f"You entered: {value}")


5. Using finally
 The finally block executes regardless of whether an exception occurred or
not. It's typically used for cleanup actions.