What is the difference between a For loop and a While loop?

A For loop is for when you know exactly how many times you want to repeat (like for every day in a week). A While loop is for when you don't know (like keep running until the battery is 1%).

Be careful with While loops—if the condition never becomes false, the loop will run forever! We call that an 'Infinite Loop', and it can make your computer very hot.