Build a Linked List - Step 11

Python
1

Tell us what’s happening:

class LinkedList:
class Node:
def init(self, element):
self.element = element
self.next = None

def __init__(self):
    self.length = 0
    self.head = None

def is_empty(self):
    return self.length == 0

def add(self, element):
    node = self.Node(element)
    if self.is_empty():
        self.head = node
    else:
        current_node = self.head   # <-- assign self.head to current_node

Your code so far

class LinkedList:
    class Node:
        def __init__(self, element):
            self.element = element
            self.next = None
            
    def __init__(self):
        self.length = 0
        self.head = None

    def is_empty(self):
        return self.length == 0
    

# User Editable Region

    def add(self, element):
        node = self.Node(element)
        if self.is_empty():
            self.head = node
        else:
            current_node = self.head   # <-- assign self.head to current_node

            while current_node.next is not None:
                current_node = current_node.next

            current_node.next = node

# User Editable Region

        self.length += 1

    def print_list(self):
        cur = self.head
        while cur:
            print(cur.element, end=" -> " if cur.next else "\n")
            cur = cur.next


# Test
my_list = LinkedList()
print(my_list.is_empty())  # True
my_list.add(1)
my_list.add(2)
my_list.add(3)
print(my_list.is_empty())  # False
my_list.print_list()       # 1 -> 2 -> 3

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Challenge Information:

Build a Linked List - Step 11

2

Please Tell us what’s happening in your own words.

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