Adding early CS challenge solutions

CS4 - Challenge Solution/Main.java

@@ -0,0 +1,24 @@
+import java.util.Scanner;
+
+public class Main {
+    public static void main(String[] args) {
+        Scanner scan = new Scanner(System.in);
+
+        System.out.print("Enter your age: ");
+        int age = scan.nextInt();
+
+        scan.close();
+
+        if(age <= 18) {
+            System.out.println("You're a youngin'");
+        } else if(age > 18 && age <= 35) {
+            System.out.println("The early adult years");
+        } else if(age > 35 && age <= 55) {
+            System.out.println("Middle aged, time to buy a really expensive car");
+        } else if(age > 55 && age <= 64) {
+            System.out.println("Getting old...");
+        } else {
+            System.out.println("Retirement! Time to live out the golden years.");
+        }
+    }
+}