/*
  Author:  James Tam
  Version: January 8, 2020 (minor modifications to an earlier version)
  Learning objective: Implementing a If, else-if branching structure
  (at most only one case can be true).

*/


import java.util.Scanner;

public class IfElseIfExample
{
    public static void main(String [] args)
    {
        final int FIRST_CHARACTER = 0;
        char letter = ' ';
        Scanner in = new Scanner(System.in);
        System.out.print("Enter the letter grade: ");
        letter = in.nextLine().charAt(FIRST_CHARACTER);
        if (letter == 'A')
            System.out.println("4.0");
        else if (letter == 'B')
            System.out.println("3.0");
        else if (letter == 'C')
            System.out.println("2.0");
        else if (letter == 'D')
            System.out.println("1.0");
        else if (letter == 'F')
            System.out.println("0.0");
        else
            System.out.println("Letter grade must be one of A, B, " +
              "C, D, F");
    }
}