06_Adding Elements At The Beginning Of The Linked List.py

class Node:
    def __init__(self,data):
        self.data = data
        self.ref = None
class LinkedList:
    def __init__(self):
        self.head = None


    def print_LL(self):
        if self.head is None:
            print("Linked List is empty")
        else:
            n = self.head
            while n is not None:
                print(n.data)
                n = n.ref


    def add_begin(self,data):
        if self.head is None:
            self.head = Node(data)
        else:
            new_node = Node(data)
            new_node.ref = self.head
            self.head = new_node


LL1 = LinkedList()
LL1.add_begin(10)
LL1.add_begin(20)
LL1.print_LL()