Linked List Implementation

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A linked list is a linear data structure where elements are stored in separate objects called nodes. Each node contains a data field and a reference (or pointer) to the next node in the sequence. Here’s a breakdown of the key components and operations in a linked list implementation:

1. **Node Class**: This is a nested class within the linked list class. It defines the structure of each node in the linked list. Each node typically contains two fields:
2. . – `data`: This field stores the actual data of the element.
3. . – `next`: This field is a reference to the next node in the sequence.

2. **LinkedList Class**: This is the main class representing the linked list. It contains:

. – `head`: This is a reference to the first node in the list. If the list is empty, `head` is `null`.

3. **Insertion Operation**: The `insert()` method adds a new element to the end of the linked list. It first creates a new node with the given data. If the list is empty (`head` is `null`), the new node becomes the `head`. Otherwise, it traverses the list until it reaches the last node, then appends the new node to the end.

4. **Display Operation**: The `display()` method prints the elements of the linked list. It starts from the `head` node and traverses the list, printing the data of each node until it reaches the end (`null`).

5. **Main Method**: This is where you create an instance of the `LinkedList` class and perform operations on it. In this example, we create a linked list, insert some elements into it, and then display the list.

In summary, a linked list is a dynamic data structure where elements are connected via pointers, allowing for efficient insertion and deletion operations. Each element is stored in a node, and the nodes are linked together to form the list.