Friends I had doubt in this code.pls solve my doubt

Question

In my remove duplicates linked list code(my post).
I don't understand how (head) node get remove duplicates without assign or modify it in(remove duplicates) function.Do u know it share with me

Answer 1

I don't get what you're saying. What programming language is this?

Answer 2

could you specify more?

Answer 3

What could I specify

Answer 4

Can you please share your try