Answer: Python Puzzler #3995

The answer is D. The program prints:

1
2
3
4
Zap
6
7
8
9
Zap

This answer was checked by running the program for real.

Why?

Every number that divides exactly by 5 (remainder 0) is replaced by ‘Zap’. All the others are printed as they are.

Trace table

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

number	number % 5	printed
1	1	1
2	2	2
3	3	3
4	4	4
5	0	Zap
6	1	6
7	2	7
8	3	8
9	4	9
10	0	Zap

The code again

for number in range(1, 11):
    if number % 5 == 0:
        print("Zap")
    else:
        print(number)