Exception Handling in Python with Example

Exception Handling in Python :

• Definition: Exception handling allows the program to catch and handle runtime errors without crashing. It is done using try, except, and optionally finally blocks.
• Important Keywords: try, except, else, finally.

Types of Errors:

1. Compile-time Error:
   • Definition: Occurs during code compilation before execution. Syntax errors, like misspelling a function, lead to compile-time errors.

   Example:

   print("heyy")
   printt("hey")  # Compile-time error: NameError because 'printt' is not defined
       

2. Logical Error:
   • Definition: The code runs successfully but produces incorrect results due to a logic flaw in the program.

   Example:

   a = 10
   b = 30
   print(a + a)  # Logical error: Prints 40 instead of the expected result (10 + 30)
       

3. Runtime Error:
   • Definition: Occurs while the program is running, usually due to invalid input, division by zero, etc.

   Example:

   a = int(input())
   b = int(input())
   print(a + b)  # Runtime error when input is not an integer (e.g., 'hiii')
       

Exception Handling with try and except:

Basic Exception Handling:

• Definition: Catches any exception without specifying the type.

Example Program:

try:
    a = int(input())
    b = int(input())
    print(a + b)
except:
    print("Something went wrong")  # Catches all exceptions

Example Input:

10
20

Output:

Sum: 30