else in the end of for and while loops

Question

who can say me: What is the difference between writing code inside else or just after the loops?
for x in range(6):
print('hello')
print('bye')
or

for x in range(6):
print('hello')
else:
print('bye')

Answer 1

The `else` block after a while...loop or a for...loop is executed ONLY when the loop completed the entire loop iterations without any `break` statement issued. If the loop broke out somewhere, then the `else` block will not be executed.

In first example, "bye" will be printed unconditionally, whether the loop completed with or without `break` statement issued, "bye" will be printed.

In second example, "bye" will be printed ONLY when the loop completed without any `break` statement issued ever.

Answer 2

I think that the `else` keyword is there because in some cases there is needed an action to be done right after the loop ends. So I guess that the loop should end right after the `else` part is executed.
On the other hand, this really can't make a big difference in most of cases as it can just be another part or whatever that doesn't require to be connected with a loop.
Anyways, is a good opportunity to check Python Docs and Features.

Answer 3

The will cause an error. You NEED a previous if statement if you want an else statement.

You can also just run the code and see for yourself