can you please explain what happens when we insert the first node , and why do we have to point it to itself for the first node.
also i am getting wrong output
Doubt in self loop
Hey @chitranshanmol07, i am not getting what do you mean by first node? Do you mean what will happen when we insert a new node at head?
The questions you have commented in your code are:
why not null?because last node points to head
Answer for that is , since your last element has it’s tail pointing to head of linked list which has an address instead of null value. So it will be head only. Moreover the code you wrote is working absolutely fine on IDE . So, there’s some technical issue in ide. Hope i helped you 
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