96vksinghcort
diff --git a/‎11-20/19. Remove Nth Node From End of List.js
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+10-7Lines changed: 10 additions & 7 deletions b/‎11-20/19. Remove Nth Node From End of List.js
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+10-7Lines changed: 10 additions & 7 deletions
@@ -1,17 +1,20 @@
 var removeNthFromEnd = function(head, n) {
-    let count = 0
-    let m = head
+    let count = 0 // counter
+    let m = head // store head node
+    // count no. of nodes
     while(head != null){
-        head = head.next
-        count++
+        head = head.next // travel to next node
+        count++ // increment counter
     }
+    // create new ListNode
     let k = new ListNode(0)
-    let ans = k
+    let ans = k // store head of k list
     for(let i = 0 ; i < count ; i++){
+        // if i is not nth node from end we add that node to k list
         if(i != count - n){
             k = k.next = new ListNode(m.val)
         }
-        m = m.next
+        m = m.next // travel to next node
     }
     return ans.next
-};
+};