This section and Section 4.7 solve two variations of a class average problem. Consider the following problem statement:
A class of ten students took a quiz. The grades (0 to 100) for this quiz are available to you. Calculate and display the total of the grades and the class average.
The class average is equal to the sum of the grades divided by the number of students. The algorithm for solving this problem on a computer must input each of the grades, calculate the average and print the result. We use counter-controlled repetition to input the grades one at a time.