What's the use of "else" at the end of a for or while block in Python?

Question

I already have a lot of experience in Python, but recently I've seen some people using else at the end of a while or for block. I was very curious and decided to test:

for i in range(2):
    print(i)
else:
    print("Something...")

Output:

0
1
Something...

Using or not else, the code will execute the same way, so what's the use of this?

You can read about that [in the documentation](https://docs.python.org/3/tutorial/controlflow.html#break-and-continue-statements-and-else-clauses-on-loops). — larsks, Dec 20 '19 at 00:14

score 3 · Answer 1 · answered Dec 20 '19 at 00:14

3

else after a for or while block will execute if and only if the block terminates normally. If you leave through a break or exception, that else block gets skipped.

for i in range(2):
    print(i)
    break
else:
    print("Something...")

Output:

answered Dec 20 '19 at 00:14

Prune

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What's the use of "else" at the end of a for or while block in Python?

1 Answers1