else and finally

Learn else and finally blocks.

else and finally

The else block runs only when try does NOT raise an error. The finally block always runs — error or not:

try:
    x = 10 / 2
except ZeroDivisionError:
    print("sıfıra bölme")
else:
    print(x)       # 5.0
finally:
    print("bitti")  # always

else runs code when try succeeds. finally is used for cleanup (closing files, releasing resources).

Both are optional, but finally is the safest block.

Difference between else and finally

else runs only if try succeeds — it is skipped on error. finally runs whether or not an error occurs:

# no error: else + finally
# error: except + finally (else is SKIPPED)

Put success-dependent code in else (e.g. printing the result). Put code that must always run in finally (e.g. closing a file).

This separation cleanly distinguishes cleanup from success code.

Exercise try/else/finally together

Inside a try block write result = 10 / 2. Inside an except ZeroDivisionError: block write print("hata"). Inside an else: block write print(result). Inside a finally: block write print("bitti").

Show example solution

try:
    result = 10 / 2
except ZeroDivisionError:
    print("hata")
else:
    print(result)
finally:
    print("bitti")

Test yourself

Complete the finally keyword

try:
    x = 10 / 2
____:
    print("bitti")

Show answer

try:
    x = 10 / 2
finally:
    print("bitti")

Match else/finally

else

Runs if no error
finally

Always runs
except

Runs on error
try

Protected code
When does the else block run?
- Always
- Only on error
- Only when no error
- Never
Show answer

Only when no error — else runs only when the try block does not raise an error.

Next lesson: raise

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