In a singly-circularly-linked list, each node has one link, similar to an ordinary singly-linked list, except that the link of the last node points back to the first node. As in a singly-linked list, new nodes can only be efficiently inserted after a node we already have a reference to.
For this reason, it’s usual to retain a reference to only the last element in a singly-circularly-linked list, as this allows quick insertion at the beginning, and also allows access to the first node through the last node’s next pointer. The following figure shows a singly circularly linked list.
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