Java How to Program, Early Objects, 11th Edition

... user types the end-of-file indicator.

Line 25 inputs a grade value from the user. Line 26 adds grade to total. Line 27 increments gradeCounter. These variables are used to compute the average of the grades. Lines 30–47 use a switch statement to increment the appropriate letter-grade counter based on the numeric grade entered.

Processing the Grades

The switch statement (lines 30–47) determines which counter to increment. We assume that the user enters a valid grade in the range 0–100. A grade in the range 90–100 represents A, 80–89 represents B, 70–79 represents C, 60–69 represents D and 0–59 represents F. The switch statement consists of a block that contains a sequence of case labels and an optional default case. These are used in this example ...