csc102 lab 2 Insertion Sort

/**
 * @author Justin Palmer
 * 9/24/2021
 * csc102
 * Computer Science 2
 * Lab 2
 */


import java.util.Scanner;
import java.util.ArrayList;
public class Main {
    public static void main(String[] args) {
        //Creating Scanner and arraylist for later use
        ArrayList<Integer> al = new ArrayList<Integer>();
        Scanner sc = new Scanner(System.in);

        //Getting a first number to populate the arraylist with
        System.out.println("Enter a number to add to the list");
        System.out.printf(">  ");
        int r = sc.nextInt();
        al.add(r);

        //Getting a second/last number to populate with before looping to make it easier
        System.out.println("Enter a number to add to the list");
        System.out.printf(">  ");
        r = sc.nextInt();
        if (r<al.get(0)) {
            al.add(al.get(0));
            al.set(0, r);
        } else {
            al.add(r);
        }

        //creating a way to end the program on user command by exiting loop when a negative number is entered
        int value = 0;
        while (value==0) {
            //See if the user wants to quit
            System.out.println("Enter a number to add to the list or -1 to exit");
            System.out.printf(">  ");
            r = sc.nextInt();

            //create the escape if the user enters a negative number
            if (r<0) {
                value = 1;
            } else {
                //Find where the number belongs in the list
                int i = 0;
                while (i<al.size()) {
                    //if the number is smallest than the first one add it as the first
                    if (r<al.get(i)) {
                        al.add(i, r);
                        i=al.size();
                    } else { // if it's not smaller than the first
                        if (i==(al.size()-1)) { //then if it's not smaller than the last one it appends r
                            al.add(r);
                        }
                        i++; // increase the index to finish the loop
                    }
                }
            }
        }

        //Show the user their sorted list
        System.out.println("Your Sorted List Is: ");
        System.out.println(al);

        sc.close();
    }
}