Скачать или смотреть 🔗 Day 31 | DSA | Linked List

A Linked List is a dynamic data structure used to store items in non-contiguous memory locations. Each item (called a node) contains:

✅ Data
🔗 Pointer to the next node

Unlike arrays, linked lists don’t require predefined size — they grow as needed!

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🧠 Why Use Linked List?

Dynamic memory allocation

Efficient insertion & deletion (especially at beginning/middle)

Avoids memory wastage (no fixed size)

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👨‍💻 Java Code Example:

class Node {
int data;
Node next;

Node(int value) {
data = value;
next = null;
}
}

public class LinkedList {
Node head;

// Insert at end
void append(int value) {
Node newNode = new Node(value);
if (head == null) {
head = newNode;
return;
}
Node temp = head;
while (temp.next != null)
temp = temp.next;
temp.next = newNode;
}

// Print list
void printList() {
Node current = head;
while (current != null) {
System.out.print(current.data + " ➡ ");
current = current.next;
}
System.out.println("null");
}
}

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📌 Types of Linked Lists:

Singly Linked List

Doubly Linked List

Circular Linked List

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