/home/caleb/ASDV-Java/Assignments/MP3_CalebFontenot/src/mp3_calebfontenot/Stats.java

    /*
     * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
     * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
     */
    package mp3_calebfontenot;

    import java.util.Scanner;

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

        public static void main(String[] args)
        {
            // Create scanner
            Scanner input = new Scanner(System.in);
            // Define variables
            double mean = 0; //It's twice as mean
            double inputSum = 0, numberOfTimesRun = 0, inputPow = 0, deviation = 0;
            String userInput = "";

            // Prompt for input
            do {
                System.out.println("Press Y/y to enter a series of numbers or Q/q to quit.");
                System.out.println("Current sum: " + inputSum);
                userInput = input.next();
                    if (userInput.toLowerCase().equals("y")) {
                        try {
                            do {
                                System.out.print("Please enter a series of numbers; Type '-1' to quit (no quotes, you doofus!): ");
                                userInput = input.next();
                                if (Double.parseDouble(userInput) != -1) {
                                    inputSum += Double.parseDouble(userInput);
                                    inputPow += Math.pow(Double.parseDouble(userInput), 2);
                                    numberOfTimesRun++; // counter to store number of times we've added to input sum
                                }
                                if (numberOfTimesRun == 0) {
                                    System.out.println("No numbers entered!");
                                }
                                System.out.println("Current sum: " + inputSum);
                                System.out.println("Input sum^2: " + inputPow);
                            } while (Double.parseDouble(userInput) != -1);
                        } catch (Exception e) {
                            System.out.println("Invalid input!");
                        }

                } else {
                    System.out.println("Invalid input!");
                }
                    // Calculate mean
                    mean = inputSum / numberOfTimesRun;
                    // Calculate deviation
                    if (numberOfTimesRun == 1) { // if the loop has only run once,  don't bother calculating it, because the deviation is zero.
                        deviation = 0;
                    } else {
                        deviation = Math.sqrt((inputPow - (Math.pow(inputSum, 2) / numberOfTimesRun)) / (numberOfTimesRun - 1));
                    }
                    System.out.println();
                    System.out.println("The mean is: " + mean);
                    System.out.println("The deviation is: " + deviation);

                }
                while (!(userInput.toLowerCase().equals("q")));
            }
        }