Remove Duplicates from Sorted List

/**
 * 83. Remove Duplicates from Sorted List
 * <p>
 * Given a sorted linked list, delete all duplicates such that each element appear only once.
 * <p>
 * Example 1:
 * <p>
 * Input: 1->1->2
 * Output: 1->2
 * Example 2:
 * <p>
 * Input: 1->1->2->3->3
 * Output: 1->2->3
 */
public class RemoveDuplicatesFromSortedList {
	public ListNode deleteDuplicates(ListNode head) {
		//base case
		if (head == null || head.next == null)
			return head;

		ListNode current = head;
		while (current != null) {
			if (current.next == null)
				break;

			if (current.val == current.next.val) {
				//removing duplicate breaking the link
				current.next = current.next.next;
			} else {
				current = current.next;
			}

		}
		return head;
	}
}