Question

You need to write a program that has Karel take all the tennis balls where Karel is standing if there are any there.

Karel should end up with no tennis balls on that spot.

Which control structure do you need to use?



For Loop


While Loop


If Statement


If/Else Statement


None of these

Answer 1

To solve the problem where Karel needs to take all the tennis balls from the spot where he is standing, a **While Loop** would be the most appropriate control structure.

This is because Karel should continue picking up tennis balls as long as there are tennis balls present. A while loop allows Karel to repeatedly execute the action of picking up a tennis ball until there are none left at that location.

Here's a brief example of what this might look like in pseudocode:

```plaintext
While there is a tennis ball on the current spot:
take a tennis ball
```

So, the correct answer would be **While Loop**.