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Linked List Assignment Help

Linked List is little difficult concept for beginner, It may not be easy for you to complete your Linked List Assignment. If you are one of them, I can help you in your linked List Assignment.

If you are interested to learn these concept I am providing you important concept of linked list. You can learn from it.

Are you curious to know what linked list is, what's its importance and why we use linked list..I am here to guide you in detail..

Linked list can be implemented in any of the programming languages, you are good in it.

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Now, lets answer your question first, what are linked list..?

Linked list are data structures, which consists of group of nodes. Node has two parts first part is called INFO part and second one is LINK, which contains the link of next node.

Singly linked list

Linked list is similar to train, where the first bogie is connected to the second by a link, similarly second to the next and so on. The last bogie doesn't contain any link.

Similarly in the Linked list, the last node contains NULL, which means there is no further link to the other node i.e. wherever you encounter NULL in the linked list it is obvious that it is the last node.

Linked list are of different kinds
  1. Singly linked list or Linear linked list or One way linked list
  2. Circular linked list
  3. Doubly linked list or Two way linked list or Two way chain

The case above explained is for the Singly Linked list. Singly linked list contains one pointer pointing to the first node.

Circular linked list: 

They are almost same except one thing that is unlike the last bogie of the train it contains link to the first node from the last node where there was NULL present before. Now the last node is connected to the first node by the link of the first node hence making a circle and are known as circular linked list.

Doubly linked list:

Doubly linked list are another type of linked list which contains two address values means we need to maintain two pointers. The first pointer contain the address of previous node and the second pointer contains the value of next node.

Suppose the node we are considering here is the first node, then this means that the first pointer will contain NULL, as there is no node before it and the second pointer will contain the link of the second node which is next to it.

There can be another case when the node is present at the end, then the second pointer will contain NULL as there is no further node and the first pointer will contain link of the node which is just before the last node.

Some operations can be performed in linked list.These operations are: insertion of nodes and deletion of nodes.

Insertion can be done at three places:
1. At the beginning.
2. At the end.
3. In the middle.

and same goes with the deletion of nodes.

Now, let me show you how it is done. It is very easy to understand.


Insertion at the beginning of the linked list:

Step 1: Create a new node having both INFO as well as LINK part.
Step 2: Fill the data you want into INFO field.
Step 3: Make its link NULL(because this is the first as well as last node in the linked list).
Step 4: Attach newly created node to the start.
Step 5: Make the new node as the beginning node.

Insertion at the end of the linked list:

Step 1: Create the node.
Step 2: Fill the date into INFO field.
Step 3: Assign NULL to the LINK part(as this is the last node).
Step 4: If linked list empty, then make this node as new node.
Step 5: Make the next node as the last node.

Insertion in the middle of the linked list:

Step 1: Create the new node having both INFO as well as LINK part.
Step 2: Search the next pointers until you reach the node you want to insert after.
Step 3: Change your inserted node's next pointer to match that of the first one's(A's) next pointer.
Step 4: Change first node's next pointer point to B node.


Deletion at the beginning of the linked list:

Step 1: Start with the first node pointed to by the pointer.
Step 2: Remove original node.
Step 3: Mark the memory used by it as free.
Step 4: Node deleted.

Deletion at the end of the linked list:

Step 1: Mark the previous node with the null pointer.
Step 2: Mark the memory of the deleted node as free.
Step 3: Update the previous node's pointer with the address held of temporary memory.
Step 4: Node deleted.

Deletion at the middle of the linked list:

Step 1: Traverse until you get the node you want to delete.
Step 2: Copy pointer of removed node into temporary memory.
Step 3: Remove the node from the list and mark the memory it was using as free.
Step 4: Update the previous node's pointer with the address held in temporary memory.
Step 5: Node deleted.

For Circular linked list Assignment contact here.
For linked list Assignment  in C contact here.
For linked list Assignment  in C++ contact here.
For linked list Assignment  in JAVA contact here.

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