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What is a Linked List?
- Successive elements are connected by pointers
- The last element points to NULL
- Can grow or shrink in size during the execution of a program
- Can be made just as long as required (until systems memory exhausts)
- Does not waste memory space (but takes some extra memory for pointers). It allocates memory as the list grows.
Linked List Representation
- Linked List contains a link element called first.
- Each link carries a data field(s) and a link field called next.
- Each link is linked with its next link using its next link.
- The last link carries a link as null to mark the end of the list.
Types of Linked Lists
Basic Operations
- Insertion − Adds an element at the beginning of the list.
- Deletion − Deletes an element at the beginning of the list.
- Display − Displays the complete list.
- Search − Searches an element using the given key.
- Delete − Deletes an element using the given key.
Benefits of Using Linked Lists
Efficient Operations: Insertions and deletions are faster compared to arrays, especially if the pointer/reference to the node is already available.
Memory Efficient: Memory is allocated only when required, unlike arrays where the size is fixed in advance.
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