/home/caleb/ASDV-Java/lab6_CalebFontenot/src/main/java/com/calebfontenot/lab6_calebfontenot/IfElse4.java

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     * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
     */
    package com.calebfontenot.lab6_calebfontenot;

    import java.util.Scanner;

    /**
     *
     * @author caleb
     */
    public class IfElse4 {

        static double inputPrompt() {
            double grade;
            System.out.print("Enter your exam grade for it to be letter graded: ");
            grade = new Scanner(System.in).nextDouble();
            return grade;
        }
        static void ifLogic(double grade) {
            // Use if else logic and output
            if (grade > 100) {
                System.out.println("Your grade seems too high, please try again...");
                throw new IllegalArgumentException("Invalid grade entered!");
            }
            else if ( grade > 90)
            {
                System.out.println("Congrats! You got a " + grade + ", which means you got an A!");
            }
            else if ( grade > 80)
            {
                System.out.println("Good job! You got a " + grade + ", which means you got a B!");
            }
            else if ( grade > 70)
            {
                System.out.println("Not bad, you got a " + grade + ", which means you got a C.");
            }
            else if ( grade > 60)
            {
                System.out.println("You got a " + grade + ", which means you got a D.");
            }
            else if (grade < 0) {
                System.out.println("Your grade seems too low, please try again...");
                throw new IllegalArgumentException("Invalid grade entered!");
            }
            else
            {
                System.out.println("Sorry, you got a " + grade + ", so you unfortunately got an F.");
            }
        }

        public static void main(String[] args) {
            // Setup variables
            double grade;
            String letterGrade;

            while (true) {  // Unintended behavior: This will only run twice. I intended this try and catch to run indefinately, but it only will catch once before terminating on its own.
                // Call ifLogic function
                try {
                    // Prompt for input
                    grade = inputPrompt();
                    ifLogic(grade);
                    System.exit(0);
            }
                catch(Exception IllegalArgumentException) { // ifLogic failed, try again...
                    // Prompt for input
                    grade = inputPrompt();
                    ifLogic(grade);
            }
            }
        }

    }