After providing a class number that is too high to be counted, if the user attempts to press enter to leave the input blank and skip the step of inputting the number of classes attended, the error message "Classes attended must be 0 or more" is given for as many times as the invalid input class number was attempted.
After providing a class number that is too high to be counted, if the user attempts to press enter to leave the input blank and skip the step of inputting the number of classes attended, the error message "Classes attended must be 0 or more" is given for as many times as the invalid input class number was attempted.
