Find loop length in a cyclic/circular linked list

Input :

A linked list

Output:

An integer

This post is a follow-up of
- JavaScript Linked List Example
- Detect a loop in cycliccircular linked list.
I recommend reading those posts first, as the following code uses the methods from it.

Logic:

• Find the loop, using the same logic Detect a loop in cycliccircular linked list.
• Move p2 one step at a time keeping p1 at a fixed location.
• Use a loopLength variable to keep track of loop length.
• When p1 === p2 return the loopLength.

Solution:

References :

• Stackoverflow
• Floyd's algorithm for cycle detection