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sorting/selection_sort_recursive.cpp

@@ -4,7 +4,22 @@
  * sort](https://en.wikipedia.org/wiki/Selection_sort)
  * implementation using recursion
  * @details
- * C++ program to sort an array using a recursive selection sort algorithm
+ * The selection sort algorithm divides the input list into two parts: a sorted sublist of items which is built up from 
+ * left to right at the front (left) of the list, and a sublist of the remaining unsorted items that occupy the rest 
+ * of the list. Initially, the sorted sublist is empty, and the unsorted sublist is the entire input list. The algorithm 
+ * proceeds by finding the smallest (or largest, depending on the sorting order) element in the unsorted sublist, 
+ * exchanging (swapping) it with the leftmost unsorted element (putting it in sorted order), and moving the sublist 
+ * boundaries one element to the right.
+ * 
+ * ### Implementation
+ * FindMinIndex
+ * This function finds the minimum element of the array(list) recursively by simply comparing the minimum element of
+ * array reduced size by 1 and compares it to the last element of the array to find the minimum of the whole array. 
+ * 
+ * SelectionSortRecursive
+ * Just like selection sort, it divides the list into two parts (i.e.: sorted and unsorted) and finds the minimum of the
+ * unsorted array. By calling the `FindMinIndex` function, it swaps the minimum element with the first element of the list, and then
+ * solves recursively for the remaining unsorted list.
  * @author [Tushar Khanduri](https://github.com/Tushar-K24)
  */