Answer: Python Puzzler #1696

The answer is D. The program prints:

10 1

Checked by running the program for real.

// divides and throws away the remainder: each friend gets 10 sweets. % gives the remainder: 1 sweet left over.

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

sum	answer
31 // 3	10
31 % 3	1

sweets = 31
friends = 3
print(sweets // friends, sweets % friends)

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