Answer: Python Puzzler #1637

The answer is C. The program prints:

4 0

Checked by running the program for real.

// divides and throws away the remainder: each friend gets 4 sweets. % gives the remainder: 0 sweets left over.

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

sum	answer
16 // 4	4
16 % 4	0

sweets = 16
friends = 4
print(sweets // friends, sweets % friends)

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