Final answer:
The code snippet demonstrates how to create a Node class and use it to create and maintain a linked list with head and tail references that points to the first and last nodes respectively. It iterates through numbers 1 to 100, adding each as a new Node to the list.
Step-by-step explanation:
To create a linked list with head and tail references in a main program, you will first need to define a Node class that will represent each element of the list. Here's how you could write a simple Node class and subsequently use it to create a linked list of integers from 1 through 100:
class Node:
def __init__(self, data):
self.data = data
self.next = None
def main():
# Initialize head and tail
head = None
tail = None
for i in range(1, 101):
new_node = Node(i)
# If the list is empty, new node is head and tail
if head is None:
head = new_node
tail = new_node
else:
# Link the new node to the current tail
tail.next = new_node
# Update the tail to the new node
tail = new_node
# Verify the list by traversing it
current = head
while current:
print(current.data)
current = current.next
if __name__ == '__main__':
main()
In this code, the main method initializes head and tail to None. It then iterates from 1 to 100, creating a new Node for each integer and appending it to the list. After the loop, head points to the first node, and tail points to the last node of the linked list.