Answer: Python Puzzler #3879

The answer is D. The program prints:

7 2

This answer was checked by running the program for real.

Why?

// divides and throws away the remainder: each friend gets 7 sweets. % gives the remainder: 2 sweets left over.

Trace table

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

sumanswer
30 // 47
30 % 42

The code again

sweets = 30
friends = 4
print(sweets // friends, sweets % friends)

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