The answer is C. The program prints:
RRR OOO BBB OOO TTT
Why?
A for loop can go through a string one letter at a time. Each letter is printed 3 times in a row.
Trace table
A trace table follows the program step by step. Here’s this one:
| letter | printed |
|---|---|
| R | RRR |
| O | OOO |
| B | BBB |
| O | OOO |
| T | TTT |
The code again
for letter in "ROBOT":
print(letter * 3)Try it: change one number in the program and predict the new output before you run it.