It'll be especially difficult while balancing your nerves and talking to the interviewer. Take advantage of the whiteboard not just to record things, but also to think through potential steps.

Let's walk through it step by step and then look at working code. Let's reverse an extremely basic list, like 8 -> 4. The first line is let nextNode = head.next;, which will store the node to the right.

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nextNode = 4

// 8 -> 4