The answer
A do-while loop is perfect here. Start the pointer at the head, process it, move to the next, and continue while the pointer is not equal to the head.
When to Use Do-While Loops in Algorithmic Problems
How do you traverse a circular linked list?
More FAQs in When to Use Do-While Loops in Algorithmic Problems
A while loop checks the condition before running, so it might run zero times. A do-while checks the condition after running, guaranteeing at least one execution.
No, they are quite rare in standard algorithmic interviews, though they may appear in problems involving circular structures.
Yes. If the condition evaluated at the end of the loop always returns true, the loop will execute infinitely.
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