Answer: Python Puzzler #693

The answer is C. The program prints:

1
What the program prints
Checked by running the program for real.

Why?

count goes through the string and counts how many times ‘m’ appears.

Trace table

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

lettermatches?
myes
i
s
s
i
s
s
i
p
p
i

The code again

word = "mississippi"
print(word.count("m"))

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