Solution Review: Letter Grade to GPA

Explore how to implement and review a Java static method that converts letter grades to GPA values. Learn to use switch statements effectively for multiple cases and handle invalid inputs with default cases, reinforcing your method writing and error handling skills.

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Solution: Is your GPA correct?
Understanding your Code

Java

class gpaHelper{

    public static double letterToGPA (String grade) {
        double answer;

        switch (grade) {
            case "A+":
            case "A":
                answer = 4;
                break;

            case "A-":
                answer = 3.7;
                break;

            case "B+":
                answer = 3.3;
                break;

            case "B":
                answer = 3;
                break;

            case "B-":
                answer = 2.8;
                break;

            case "C+":
                answer = 2.5;
                break;

            case "C":
                answer = 2.0;
                break;

            case "C-":
                answer = 1.8;
                break;

            case "D":
                answer = 1.5;
                break;

            case "F":
                answer = 0;
                break;

            default:
                answer = -1;
        }

        return answer;
    }
 public static void main( String args[] ) {
        System.out.println("Grade A: " + letterToGPA("A"));
        System.out.println("Grade D: " + letterToGPA("D"));
        System.out.println("Grade L: " + letterToGPA("L"));
    }
    
}

1.Getting Started with Java!

2.Variables & User Input

3.Simple Maths & Logic

4.Strings and String Processing

5.Conditional Statements

6.Loops

7.Methods

8.Arrays

9.Classes and Inheritance

10.Generics

11.ArrayLists

Assessment

Solution Review: Letter Grade to GPA

Solution: Is your GPA correct? #

Understanding your Code