Add First In Linked List
1. You are given a partially written LinkedList class. 2. Here is a list of existing functions: 2.1 addLast - adds a new element with given value to the end of Linked List 2.2. display - Prints the elements of linked list from front to end in a single line. All elements are separated by space. 2.3. size - Returns the number of elements in the linked list. 2.4. removeFirst - Removes the first element from Linked List. 2.5. getFirst - Returns the data of first element. 2.6. getLast - Returns the data of last element. 2.7. getAt - Returns the data of element available at the index passed. 3. You are required to complete the body of addFirst function. This function should add the element to the beginning of the linkedlist and appropriately set the head, tail and size data-members. 4. Input and Output is managed for you.
Input is managed for you
Output is managed for you
addFirst 10 getFirst addFirst 20 getFirst getLast display size addLast 40 getLast addLast 50 addFirst 30 removeFirst getFirst removeFirst removeFirst getAt 3 display size removeFirst removeFirst getFirst quit
10 20 10 20 10 2 40 20 Invalid arguments 40 50 2 List is empty