i'm sorry for my bad english.
there is a spelling error on the page of " while loop ". I don't know who to contact and how, so ... i post here.
Excellent travail sur les boules for ! Petit rappel, la syntaxe des boucles for est la suivante :
In english you can translate this by :
" Good job on the balls "
Maybe you want say " bouCles " and not " boules "