Attempt a coding challenge and inspect evaluation

00:00:00.000 — Filter and choose a challenge
Let's practise checking a program against a task. Filter the Code Challenge Hub to Python and difficulty one. Open Sum Two Numbers and read what the program must do.

00:00:11.550 — Type and submit an attempt
The task asks us to print seven plus thirteen. Here we deliberately use subtraction first, so we can inspect a failed attempt. Choose Submit Solution; this screen has no separate Run button.

00:00:24.810 — Inspect the failed attempt
The output is minus six, and the evaluator reports zero of one tests passed. The program ran, but it didn't meet the addition task. Read both the output and the test result.

00:00:37.250 — Correct one thing and resubmit
Change the minus sign to plus and submit again. The output is now twenty, which matches the arithmetic. Make small corrections like this so you can explain what changed.

00:00:49.520 — Distinguish output from grading
Notice that the local evaluator still reports zero of one tests passed. Correct output and a passing grade are separate checks. Keep this result and report the evaluation mismatch; don't claim completion just because the output looks right.