What is Header Linked List?

 Header Linked List:  A header linked list is a linked list which always contains a special node, called the header node, at the beginning of the list. The following are two kinds of widely used header lists:

(1)  A grounded header list is a header list where the last node contains the null pointer. (The term "grounded" comes from the fact that many texts use the electrical ground sysmbol to induicate the null pointer.)

(2)  A circular header list is a header list where the last node points back to the header node.

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