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 1.11.5 Is There a Ball? Exercise. 1.12 If/Else Statements Lesson. 1.12.1 If/Else Statements Video. ... 4.10.5 Write Your Own CodeHS Exercise. 4.11 Objects vs ... CodeHS | 2.10.5 - Is There a Ball. 470m. May 16th, 2017. ... // Karel should put a ball on the first spot // if there isn't one already there and then move.