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We should also check if head == null then there we could write a different code like head= new Node();, head.data = data and finally return head and in the else part your code should be written?
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Insert a node at the head of a linked list
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We should also check if head == null then there we could write a different code like head= new Node();, head.data = data and finally return head and in the else part your code should be written?