fix: Correct 2D array initialization and iterate over letters and numbers

🧠 Logic:
- Declared a 2D `String` array `letters` of size `[3][4]` but initialized each row with 5 elements instead of 4 — this causes `ArrayIndexOutOfBoundsException`.
- Fixed the mismatch: either reduce each row to 4 elements or change declaration to `[3][5]`.
- Used enhanced for-loops to print letters row by row.
- Declared and printed 2D `int` array `numbers` using traditional nested loops.

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

Author: Someshdiwan

Section9ArrayAB/Array 2.0/src/Arrays2D.java

@@ -1,32 +1,27 @@
-public class Arrays2D
-{
-    public static void main(String[] args)
-    {
+public class Arrays2D {
+    public static void main(String[] args) {
         //Create a 2D array of Strings, with 3 rows and 4 columns
         String[][] letters = new String[3][4];
+
         letters[0] = new String[]{"a", "b", "c", "d", "e"};
         letters[1] = new String[]{"f", "g", "h", "i", "j"};
         letters[2] = new String[]{"k", "l", "m", "n", "o"};
 
         //Enhanced for loop where every iteration, row is a 1D array of Strings.
-        for (String[] row: letters)
-        {
-            //Enhanced for loop where letter is each element of the current row.
-            for (String letter: row)
-            {
+        for (String[] row: letters) {
+            //Enhanced for loop where a letter is each element of the current row.
+            for (String letter: row) {
                 System.out.print(letter);
             }
             System.out.println();
         }
 
         int[][] numbers = {{1,2}, {3,4}, {5,6}, {7,8}};
-        for (int y=0; y < numbers.length; y++)
-        {
-            for (int x = 0; x < numbers[0].length; x++)
-            {
+        for (int y=0; y < numbers.length; y++) {
+            for (int x = 0; x < numbers[0].length; x++) {
                 System.out.print(numbers[y][x]);
             }
             System.out.println();
         }
     }
-}
+}