PCEP Using the `else` block in loops 2

Question 1

What output does the following code produce?

for i in range(3):
    if i == 5:
        break
else:
    print('done')

Accepted Answer

done

Answer

The loop completes without hitting break, so the else block executes and prints 'done'.

Question 2

Which statement correctly describes when the `else` block of a `while` loop executes?

Accepted Answer

When the while condition becomes False naturally

Answer

The else block of a while loop executes only when the loop's condition becomes False, not when break exits the loop.

Question 3

What is printed by this code?

x = 10
while x > 0:
    x -= 3
    if x == 1:
        break
else:
    print('finished')

Accepted Answer

Nothing

Answer

x goes 10→7→4→1, triggering break at x==1, so the else block is skipped.

Question 4

Can a `for` loop's `else` block contain a `return` statement inside a function?

Accepted Answer

Yes, it returns from the function normally

Answer

The else block is ordinary Python code and can contain any valid statement, including return.

Question 5

What does this code print?

for n in [2, 3, 4]:
    for m in [1, 2]:
        if n * m == 6:
            break
    else:
        print(n)

Accepted Answer

2

Answer

For n=2: 2*1=2, 2*2=4 — no break, prints 2. For n=3: 3*2=6 — break, no print. For n=4: 4*1=4, 4*2=8 — no break, prints 4. Wait — 2 and 4 are printed.

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