def cycle_checker(head):
    """Check if the Singly Linked List is cyclic.

    Returns boolean value based on the result
    """
    marker_1 = head
    marker_2 = head
    flag = False

    while marker_2 != None and marker_2.next_node != None:
        marker_1 = marker_1.next_node
        marker_2 = marker_2.next_node.next_node
        if marker_1 == marker_2:
            return True
    return False