Answer: Python Puzzler #669

The answer is A. The program prints:

mango
What the program prints
Checked by running the program for real.

Why?

Python counts list positions from 0, so position 0 is the first item.

Trace table

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

positionnegative positionitem
0-6mango
1-5plum
2-4pear
3-3banana
4-2grape
5-1carrot

The code again

basket = ["mango", "plum", "pear", "banana", "grape", "carrot"]
print(basket[0])

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