🎯 LeetCode Problem 24 – Swap Nodes in Pairs | Linked List Tutorial (Iterative & Recursive) | Java

🌟 Dear all, Welcome to the Galaxy of Codes! 🌌 On this channel, we explore Coding, Development, Placements, and Trading Tools — simplifying complex concepts for learners, job-seekers, and aspiring professionals. Whether you’re here for DSA & Algorithms, Programming Languages (Java, C++, Python, Kotlin, Dart, JavaScript, TypeScript), or Stock Market & Trading Tools, you’ll always find something valuable to sharpen your skills 🚀 🎯 LeetCode Problem 24 – Swap Nodes in Pairs | Linked List Tutorial (Iterative & Recursive) In this video, we solve LeetCode 24: Swap Nodes in Pairs, a Medium-level Linked List problem that tests your understanding of pointer manipulation and node swapping — without changing node values! We’ll explain both iterative and recursive approaches with a step-by-step dry run and code explanation. 💡 Problem Description Given a linked list, swap every two adjacent nodes and return its head. ⚠️ You must solve the problem without modifying node values — only swap the nodes themselves. 📘 Examples Example 1 Input: head = [1,2,3,4] Output: [2,1,4,3] Example 2 Input: head = [] Output: [] Example 3 Input: head = [1] Output: [1] Example 4 Input: head = [1,2,3] Output: [2,1,3] ⚙️ Constraints Number of nodes: [0, 100] 0 ≤ Node.val ≤ 100 📚 Topics Covered: Linked List | Pointer Manipulation | Recursion | Iteration | Swapping Nodes | Data Structures | LeetCode Medium Problems ✨ What You’ll Learn Here DSA & Coding Concepts (from basics to advanced) Programming in Java, C++, Python, Kotlin, Dart, JS, TS Web & App Development (Next.js, React.js, Flutter) Interview & Placement Preparation Trading & Finance Tools for smart investing 🎓 Who is this for? Students preparing for coding interviews & placements Developers building problem-solving skills Enthusiasts exploring Stock Markets & Trading Tools Anyone who wants to code smarter & trade smarter 💡 Tip for Success: 👉 “The more you practice, the better you become.” Keep coding, solving problems, and building your foundation strong! 📌 Resources & My Work 🔗 GitHub Codes: github.com/farhaddubey 🌐 Connect With Me LinkedIn: linkedin.com/in/farhaddubey Instagram: instagram.com/farhaddubey GitHub: github.com/farhaddubey X (Twitter): x.com/farhaddubey 🔥 Tags / Hashtags: #LeetCode #LeetCodeSolutions #SwapNodesInPairs #LinkedList #PointerManipulation #Java #CPlusPlus #Python #DSA #Algorithms #CodingInterview #CodingTutorial #LeetCodeMedium #GalaxyOfCodes #CodeSmarterTradeSmarter