Final Grade.

The errors only errors that come up are that 'letterGrade' may not have been initialized. The code is exactly how it's supposed to be, I don't need any changes, but I can't figure out why that error message is there.

import java.util.Scanner;

public class FinalExam {

public static void main(String[] args){

// declaring all variables

Scanner in = new Scanner (System.in);

int choice;

double quiz;

double asign;

double project;

double Final;

double current;

double grade;

char letterGrade;

// displaying the menu

System.out.println("Please enter your choice of grade");

System.out.println();

System.out.println("1.\t A: 90-100");

System.out.println("2.\t B: 80-89.9");

System.out.println("3.\t C: 70-79.9");

System.out.println("4.\t D: 60-69.9");

System.out.println("5.\t F: 0-59.9");

System.out.println("6.\t You would like to exit the program");

//getting users choice

choice = in.nextInt();

// Displaying choice

switch (choice) {

case 1: System.out.println("You selected, A");

Final = 90;

letterGrade = 'A';

break;

case 2: System.out.println("You selected, B");

Final = 89.9;

letterGrade = 'B';

break;

case 3: System.out.println("You selected, C");

Final = 79.9;

letterGrade ='C';

break;

case 4: System.out.println("You selected, D");

Final = 69.9;

letterGrade = 'D';

break;

case 5: System.out.println("You selected, F");

Final = 59.9;

letterGrade = 'F';

break;

case 6: System.out.println("Exiting the program");

System.exit(0);

System.out.println("Ending the program");

break;

default: System.out.println("invaild choice");

}

//getting grades from student to claculate the final grade

System.out.println("Please enter your Quiz average");

quiz = in.nextDouble();

System.out.println("Please enter your Assignment average");

asign = in.nextDouble();

System.out.println("Please enter your Project average");

project = in.nextDouble();

//doing the math for the final grade

current = (.20 * asign + .20 * quiz + .20 * project);

grade = (Final - current) / .40;

// output

if (grade > 100){

System.out.println("You would need to make over 100 to pass the class for an" + letterGrade);

}else if (grade <= 0){

System.out.println("You do not have to take the final to get that grade to get a" + letterGrade);

}else {

System.out.printf("To make a" + letterGrade + "in the class, you at least need to make a a:%.3f ", grade);

}

}

}