Answer: Python Puzzler #2500

The answer is D. The program prints:

24

This answer was checked by running the program for real.

Why?

range(5, 12, 3) starts at 5, goes up in steps of 3, and stops before 12. So the loop adds 5 + 8 + 11. The total is 24.

Trace table

A trace table follows the program step by step. Here’s this one:

numbertotal after the loop body
55
813
1124

The code again

total = 0
for number in range(5, 12, 3):
    total = total + number
print(total)

Try it: change one number in the program and predict the new output before you run it.