A linked list stores elements in nodes. Each node holds data and a reference to the next node, so a singly linked list can be traversed in one direction. Its basic operations include insertion, deletion, searching, and traversal. section 2.1.1
A practical implementation uses a Node with value and next fields plus a list with a head reference. Appending walks to the final node; prepending links a new node before the current head; traversal follows references until None. section 2.1.1 section 2.1.2
Building and reversing one
A Python example appends 1 and 2, prepends 0, and traverses the result as 0 -> 1 -> 2 -> None. A reverse method can iterate through the nodes while retaining the next reference, redirecting each link to the previous node, and finally assigning the new head. section 2.1.1 section 2.1.2
AI-generated linked-list code still needs review. Distinguish a method that reverses the underlying structure from one that only displays values backward: unclear naming can create unexpected mutations and bugs. Refine prompts with the language, required operations, audience, and intended behavior, then test edge cases such as an empty list. section 2.1.1 section 2.1.3
