The answer is D. The program prints:
1 2 3 Boop 5 6 7 Boop 9
Why?
Every number that divides exactly by 4 (remainder 0) is replaced by ‘Boop’. 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 % 4 | printed |
|---|---|---|
| 1 | 1 | 1 |
| 2 | 2 | 2 |
| 3 | 3 | 3 |
| 4 | 0 | Boop |
| 5 | 1 | 5 |
| 6 | 2 | 6 |
| 7 | 3 | 7 |
| 8 | 0 | Boop |
| 9 | 1 | 9 |
The code again
for number in range(1, 10):
if number % 4 == 0:
print("Boop")
else:
print(number)Try it: change one number in the program and predict the new output before you run it.