Question

question: 2
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

Explanation:

A while loop is used when we want to repeat a block of code as long as a certain condition is true. In this case, the condition is that there are tennis balls on the spot (i.e., beepersPresent() in Karel - like programming). The loop will keep executing the takeBeeper() command until there are no more beepers (tennis balls) on the spot. A for loop is usually used when we know the exact number of iterations in advance. An if statement just checks a condition and executes a block of code once if the condition is true. An if/else statement checks a condition and executes one of two blocks of code depending on whether the condition is true or false. Since we need to repeat the action of taking beepers until there are none left (a condition - based repetition), a while loop is appropriate.

Answer:

while Loop