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Array sum · Live dry runRunning
CODE EDITOR
1 nums = [3, 7, 2, 9]
2 total = 0
3
4 for n in nums:
5     total += n
6
7 print(total)
total10 → 12
EXECUTION FLOW
Start
Take next number
n = 2
More numbers?
WHY THIS STEP?The loop selects the next value

n now stores 2. We use a loop because the same addition must happen once for every number in the list.

Step 9 of 14
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