Answer: Python Puzzler #686

The answer is B. The program prints:

Checked by running the program for real.

range(4, 7, 2) starts at 4, goes up in steps of 2, and stops before 7. So the loop adds 4 + 6. The total is 10.

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

number	total after the loop body
4	4
6	10

total = 0
for number in range(4, 7, 2):
    total = total + number
print(total)

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