feat: Implement element insertion at a specific index in an array with manual shifting [array-insertion-basic]

📌 Core Concept:
Demonstrates how to insert a new element into an existing array by shifting elements manually to make space at a given index.

🧮 Program Overview:
- Initializes an integer array `A` with a fixed capacity.
- Populates the first 6 elements manually.
- Prints the original array state.
- Inserts element `20` at index `2` by:
  - Shifting elements one position to the right starting from the end.
  - Placing the new value at the specified index.
- Prints the updated array.

🧪 Behavior:
- Original: `3, 9, 7, 8, 12, 6`
- After insertion at index 2: `3, 9, 20, 7, 8, 12`

📌 Key Features:
- Demonstrates low-level control over array manipulation.
- Highlights index-based shifting to manage fixed-size arrays.

✅ Useful for:
- Understanding static array limitations in Java.
- Teaching manual memory shifting before using higher-level structures (like `ArrayList`).

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

Author: Someshdiwan

Section9ArrayAB/Array IMP/InsertElementInArray.java

@@ -1,6 +1,5 @@
 public class InsertElementInArray {
-    public static void main(String[] args)
-    {
+    public static void main(String[] args) {
         int A[] = new int[10];
 
         A[0]=3; A[1]=9; A[2]=7; A[3]=8; A[4]=12; A[5]=6;
@@ -24,4 +23,4 @@ public static void main(String[] args)
         System.out.println("");
 
     }
-}
+}