Control Flow · interview question
A bug appears around for loops. What is the strongest first debugging move?
Multiple choiceEasychapter-2-curatedpremiumcontrol-flowfor-loops
line_totals = [19.99, 8.50, 42.00]
grand_total = 0.0
for line_total in line_totals:
grand_total += line_total
print(grand_total)Answer and explanation
Correct answer
C. Trace one concrete example, inspect the state transitions, and compare them to the intended rule before rewriting anything.
Why
That approach is reliable because it creates evidence. A believable total can still be wrong when the repeated step inside the loop is wrong or incomplete.
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