Adding the comments for the early CS's

CS6 - Challenge Solution/Main.java

@@ -1,19 +1,45 @@
 import java.util.Random;
 import java.util.Scanner;
 
+/*
+    CS6 Challenge Solution
+
+    Original Challenge Description: Write a program that generates
+    a random number, and repeatedly asks the user to guess the number,
+    telling them if they're too low, too high, of if they guess correctly.
+    The program should end once they guess the correct number. 
+*/
 public class Main {
     public static void main(String[] args) {
+        //Setup our random number generator and a scanner
+        //to get input from the user
         Random random = new Random();
         Scanner scan = new Scanner(System.in);
 
+        //Generate a random integer 0-100 (inclusive)
         int randomValue = random.nextInt(101);
 
+        //Create a value for guess and set it to something that
+        //definitely isn't going to be the random number we just
+        //generated. We do this because the while loop that we are
+        //going to use needs to run so long as the guess does not
+        //equal the random value we generated. If it's something
+        //we know isn't possible for the random number, then
+        //we know our loop will run properly at least once. 
         int guess = -1;
 
+        //While the user hasn't guessed the right number
         while(randomValue != guess) {
+            //Ask the user for a number, and overwrite
+            //the value of guess with that number
             System.out.print("Guess the number: ");
             guess = scan.nextInt();
 
+            //This if statement just checks to see if the user's guess
+            //is less, more or the same as what the random generated
+            //number was. If the guess is the same as the random number
+            //the condition of the while loop will handle getting out
+            //of the loop, so no need to call break. 
             if(guess < randomValue) {
                 System.out.println("You're too low");
             } else if(guess > randomValue) {
@@ -23,6 +49,7 @@ public class Main {
             }
         }
 
+        //Close our scanner, for good measure
         scan.close();
     }
 }