The answer is 1 here. The key is that the code within the
for loop will be executed 3 times before it no longer meets the condition
i < 3.
For the first time through the loop,
i = 0. There is one ball present, so Karel takes the ball (
ballCount = 0)
i increases by 1, so
i = 1. There are no balls present, so Karel puts 2 balls (
ballCount = 2)
i increases by 1 again, so
i = 2. There are 2 balls present, so Karel takes 1 ball (
ballCount = 1)
i increases by 1 once more, so
i = 3.
i no longer meets the condition
i < 3 to run the loop, so we exit the
Let me know if you have any questions!