Answer: Python Puzzler #1904

The answer is B. The program prints:

1
2
Zap
4
5
Zap
7
8
Zap

Why?

Every number that divides exactly by 3 (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 % 3	printed
1	1	1
2	2	2
3	0	Zap
4	1	4
5	2	5
6	0	Zap
7	1	7
8	2	8
9	0	Zap

The code again

for number in range(1, 10):
    if number % 3 == 0:
        print("Zap")
    else:
        print(number)