JAVA collegGPA program -
Java implementation to recieve userInput regarding grades and credits earned, and calculating overall GPA from it. Invalid inputs are met with error messages, and continues to prompt user to enter valid inputs. User has the ability to enter however many grades they would like.
GPA calculation based off:
GPA = total number of points / total number of credits,
where total number of points = gradeValue * number of credits,
where gradeValue is retrieved from character grade.
[A = 4, B = 3, C = 2, ...]