Update InsertionSort.c

sorting/InsertionSort.c

@@ -2,28 +2,34 @@
 #incude  <stdlib.h>
 #define MAX 20
 
-
+//i and j act as counters
+//arraySort is the array that is to be sorted
+//elmtToInsert will be the element that we will be trying to move to its correct index in the current iteration
 
 int main()
 {
     int i, elmtToInsert , j , arraySort[MAX] = {0};
 
-        for(i = 1 ; i < MAX ;  i++)
+      for(i = 1 ; i < MAX ;  i++) //This array is being sorted in the ascending order. 
        {
-            elmtToInsert = arraySort[i];
+           elmtToInsert = arraySort[i]; //Pick up the ith indexed element of the array. It will be the elmtToInsert.
            j = i - 1 ;
 
-            while( j >= 0 && elmtToInsert < arraySort[j])
+         while(j >= 0 && elmtToInsert < arraySort[j]) /*compare it with each (i-1)th, (i-2)th... max 0th element, till the correct 
+                                                        position of the elmtToInsert, where it is finally greater than the element just
+                                                        before it, is found */   
           {
-                arraySort[j+1] = arraySort[j];
+              // You'll enter the loop if the elmtToInsert is less than the element just before it.
+            
+              arraySort[j+1] = arraySort[j]; /*shift the current element one place forward to create room for insertion of the
+                                               elmtToInsert when the correct position is found */
               j--;
           }
+          //when we exit the loop, j+1 will be the index of the correct position of the elmtToInsert
 
-            arraySort[j+1] = elmtToInsert ;
+            arraySort[j+1] = elmtToInsert ; //'insert' the elmtToInsert into its correct position
         }
     
 
-
-
     return EXIT_SUCCESS;
 }