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Challenge: Linked List Cycle

Explore how to determine if a cycle exists within a singly linked list by analyzing node connections. Learn to implement a function in JavaScript that returns true if a cycle is found, helping you master linked list problems commonly asked in coding interviews.

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Statement

Given the head of a linked list, check whether or not a cycle is present in the linked list. A cycle is present in a linked list if at least one node can be reached again by traversing the next pointer. If a cycle exists, return TRUE; otherwise, return FALSE.

Constraints:

Let n be the number of nodes in a linked list.

  • 00 \leq ...