Python try and except – Handling Errors Gracefully

In Python, errors (also called exceptions) can crash your program if not handled properly.

The try and except block helps you catch and handle those errors, allowing your code to run safely even when something goes wrong.

Why Use try and except?

• Prevents program crash during runtime errors.
• Lets you display user-friendly error messages.
• Useful for validating inputs, file handling, API calls, etc.

Basic Syntax

try:
    # Code that may raise an error
except:
    # Code that runs if an error occurs

Example 1: Handling Division by Zero

try:
    result = 10 / 0
except:
    print("Oops! You cannot divide by zero.")

#Output - 
Oops! You cannot divide by zero.

Example 2: Catching Specific Exceptions

try:
    num = int(input("Enter a number: "))
    print(100 / num)
except ZeroDivisionError:
    print("Cannot divide by zero.")
except ValueError:
    print("Please enter a valid number.")

Example 3: Using else and finally

try:
    x = int(input("Enter a number: "))
    print("You entered:", x)
except ValueError:
    print("That's not a number!")
else:
    print("No exceptions occurred!")
finally:
    print("This block always runs.")

Common Built-in Exceptions

Summary

• try → Code to test
• except → Handles errors
• else → Runs if no errors
• finally → Always runs