The answer is C. The program prints:
47
This answer was checked by running the program for real.
Why?
The loop remembers the biggest number it has seen so far, and replaces it whenever it finds a bigger one. This is how computers find the maximum.
Trace table
A trace table follows the program step by step. Here’s this one:
| n | n > biggest? | biggest |
|---|---|---|
| 9 | yes | 9 |
| 29 | yes | 29 |
| 47 | yes | 47 |
| 38 | no | 47 |
| 40 | no | 47 |
The code again
numbers = [9, 29, 47, 38, 40]
biggest = 0
for n in numbers:
if n > biggest:
biggest = n
print(biggest)Try it: change one number in the program and predict the new output before you run it.