Question

You need to write a program where Karel will take a ball if there is a ball present, otherwise Karel should put down a ball.

Which control structure do you need to use?



For Loop


While Loop


If Statement


If/Else statement


None of these

Answer 1

To achieve the functionality where Karel takes a ball if it is present and puts down a ball if it is not, you would need to use an **If/Else statement**.

Here’s why:

- An **If statement** alone would only allow Karel to perform one action based on whether there is a ball. It doesn’t provide an alternative action if the condition is not met.
- A **While loop** is used for repeating a block of code as long as a certain condition is true, which is not required here since the logic only needs to check the condition once.
- A **For loop** is intended for iterating a set number of times, which is also not applicable in this scenario.
- "None of these" would suggest that none of the provided options fit the requirement, which is not the case here.

Therefore, the correct choice is **If/Else statement**.