try...except...else clause

The try...except block can be extended with an optional else clause. This clause is placed after all the except blocks and before the end of the try statement. The key idea is that the code inside the else block runs only if no exception was raised in the try block. If any exception occurs and is caught by an except block, the else block is skipped entirely.

This structure is useful for separating the "risky" code that might fail (inside try) from the code that should only execute on success (inside else). It makes the logic clearer and avoids accidentally catching exceptions that the else code itself might raise.

Program 1-5: Use of else clause

print("Handling exception using try...except...else")
try:
    numerator = 50
    denom = int(input("Enter the denominator: "))
    quotient = (numerator / denom)
    print("Division performed successfully")
except ZeroDivisionError:
    print("Denominator as ZERO is not allowed")
except ValueError:
    print("Only INTEGERS should be entered")
else:
    print("The result of division operation is ", quotient)

Here is how the program behaves in different scenarios:

• If the user enters a non-zero integer (e.g., 5): The try block runs without error. The except blocks are skipped, and the else block executes, printing the result of the division.
• If the user enters 0: The try block raises a ZeroDivisionError. The first except block catches it, prints the error message, and the else block is not executed.
• If the user enters a non-integer (e.g., "abc"): The int() function raises a ValueError. The second except block catches it, prints the message, and the else block is skipped.