Find length of circular linked list in scala

Scala program for Find length of circular linked list . Here problem description and other solutions.

// Scala program for
// Count number of nodes in circular linked list 

// Define class of linked list Node
class LinkNode(var data: Int,
	var next: LinkNode);

class CircularLinkedList(var head: LinkNode)
{
	// Class constructor
	def this()
	{
		this(null)
	}
	// Insert node at end of circular linked list
	def insert(value: Int): Unit = {
		// Create a new node
		var node: LinkNode = new LinkNode(value, this.head);
		if (this.head == null)
		{
			// First node of linked list
			this.head = node;
			node.next = this.head;
		}
		else
		{
			var temp: LinkNode = this.head;
			// Find the last node
			while (temp.next != this.head)
			{
				// Visit to next node
				temp = temp.next;
			}
			// Add new node at the last 
			temp.next = node;
		}
	}
	def countNode(): Int = {
		if (this.head == null)
		{
			return 0;
		}
		// Start with second node
		var temp: LinkNode = this.head.next;
		// This is used to count linked node
		var count: Int = 1;
		// iterate circular linked list
		while (temp != this.head)
		{
			count += 1;
			// Visit to next node
			temp = temp.next;
		}
		return count;
	}
}
object Main
{
	def main(args: Array[String]): Unit = {
		var cll: CircularLinkedList = new CircularLinkedList();
		// Add nodes
		cll.insert(1);
		cll.insert(3);
		cll.insert(5);
		cll.insert(7);
		cll.insert(9);
		cll.insert(11);
		// Display result
		println(cll.countNode());
	}
}

Output

6