add: Documetation

Author: BKarthik7

src/main/java/com/thealgorithms/others/ArrayRightRotation.java

@@ -1,8 +1,23 @@
 package com.thealgorithms.others;
 
+/**
+ * Provides a method to perform a right rotation on an array.
+ * A left rotation operation shifts each element of the array
+ * by a specified number of positions to the right.
+ * 
+ * https://en.wikipedia.org/wiki/Right_rotation *
+ */
 public final class ArrayRightRotation {
     private ArrayRightRotation() {
     }
+    
+    /**
+     * Performs a right rotation on the given array by the specified number of positions.
+     *
+     * @param arr the array to be rotated
+     * @param k the number of positions to rotate the array to the left
+     * @return a new array containing the elements of the input array rotated to the left
+     */
     public static int[] rotateRight(int[] arr, int k) {
         if (arr == null || arr.length == 0 || k < 0) {
             throw new IllegalArgumentException("Invalid input");
@@ -18,6 +33,12 @@ public static int[] rotateRight(int[] arr, int k) {
         return arr;
     }
 
+    /**
+     * Performs reversing of a array
+     * @param arr the array to be reversed
+     * @param start starting position
+     * @param end ending position
+     */
     private static void reverseArray(int[] arr, int start, int end) {
         while (start < end) {
             int temp = arr[start];