Answer: Python Puzzler #3931

The answer is D. The program prints:

False

This answer was checked by running the program for real.

Why?

First Python works out each side: 1 > 3 is False and 3 < 1 is False. and is True only if both sides are True.

Trace table

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

partvalue
1 > 3False
3 < 1False

The code again

print(1 > 3 and 3 < 1)

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