feat: Demonstrate basic array declaration, initialization, and default values in Java

🧠 Logic:
- Declares primitive types (`int`, `String`) and introduces array syntax.
- Initializes arrays with `new` and shows default values (`int` defaults to 0, `String` to null).
- Explains stack vs. heap for array references and objects.
- Example includes both individual variables and grouped data using arrays.

Signed-off-by: Somesh diwan <[email protected]>

Author: Someshdiwan

Section9ArrayAB/Array IMP/Main.java renamed to Section9ArrayAB/Array IMP/ModificationOfArray.java

@@ -1,11 +1,11 @@
-public class Main {
+public class ModificationOfArray {
 
     public static void main(String[] args) {
         // Q: store a roll number
         int a = 19;
 
         // Q: store a person's name
-        String name = "Kunal Kushwaha";
+        String name = "Kunal";
 
         // Q: store 5 roll numbers
         int rno1 = 23;
@@ -19,8 +19,8 @@ public static void main(String[] args) {
 //        // or directly
 //        int[] rnos2 = {23, 12, 45, 32, 15};
 
-        int[] ros; // declaration of array. ros is getting defined in the stack
-        ros = new int[5]; // initialisation: actually here object is being created in the memory (heap)
+        int[] ros; // declaration of an array. ros is getting defined in the stack
+        ros = new int[5]; // initialization: actually, here an object is being created in the memory (heap)
 
 //        System.out.println(ros[1]);