Running total

Add up the list [5, 10, 20] one number at a time, printing the total after each step: 5, 15, 35.

Lines indented under the for run every time round the loop; a line after the loop runs only once. Here the print belongs inside the loop.

Loop over nums and keep a total. After adding each number, print the total so far: 5, then 15, then 35.

nums = [5, 10, 20]
total = 0
for n in nums:
    total = total + n
print(total)

Click Run to see the output here.

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