Python Linked List: Find the size of a singly linked list

Last update on April 23 2025 12:56:43 (UTC/GMT +8 hours)

2. Singly Linked List Size

Write a Python program to find the size of a singly linked list.

Sample Solution:

Python Code:

class Node:
    # Singly linked node
    def __init__(self, data=None):
        self.data = data
        self.next = None
class singly_linked_list:
    def __init__(self):
        # Createe an empty list
        self.tail = None
        self.head = None
        self.count = 0
	
    def append_item(self, data):
        #Append items on the list
        node = Node(data)
        if self.head:
            self.head.next = node
            self.head = node
        else:
            self.tail = node
            self.head = node
        self.count += 1
    
    def iterate_item(self):
        # Iterate the list.
        current_item = self.tail
        while current_item:
            val = current_item.data
            current_item = current_item.next
            yield val

items = singly_linked_list()
items.append_item('PHP')
items.append_item('Python')
items.append_item('C#')
items.append_item('C++')
items.append_item('Java')

print("Original list:")
for val in items.iterate_item():
    print(val)

print("\nSize of the list:",items.count)

Sample Output:

Original list:
PHP
Python
C#
C++
Java

Size of the list: 5

Flowchart:

For more Practice: Solve these Related Problems:

Write a Python program to compute the size of a singly linked list by iterating through its nodes.
Write a Python script to count the nodes of a singly linked list using a recursive function.
Write a Python program to create a singly linked list and update a counter during each append, then verify the total size by iteration.
Write a Python program to measure the time taken to compute the size of a large singly linked list and print the result.

Go to:

Previous: Write a Python program to create a singly linked list, append some items and iterate through the list.
Next: Write a Python program to search a specific item in a singly linked list and return true if the item is found otherwise return false.

Python Code Editor:

Contribute your code and comments through Disqus.