DSA Visualizer
Linked lists, step by step
No indexes, only pointers. See why that makes traversal slower than an array but insertion and deletion faster, once you're already at the right node.
A scripted walkthrough: traverse a list, insert at the head, insert in the middle, then delete a node — the four operations that define how a linked list differs from an array.
A
B
C
Step 1 of 9
A singly linked list: A → B → C → null. Each node holds a value and a pointer to the next node — there's no index-based access like an array.
Put this into practice
Connect the idea to a worked lesson, a practical task or your interview preparation.
- Concept guideLinked Lists →A chain of nodes, each pointing to the next, that trades fast indexing for cheap insertion.
- Practice problemCycle in a Sequence Chain →Solve this medium problem with samples, hints and checks in your browser.
- LessonPointers in C →What a pointer actually holds, how & and * work together, why pointer arithmetic counts elements rather than bytes, how passing a pointer lets a function change its caller's variable, and how to write a working swap.
- Advanced projectLRU cache with tests and a benchmark →A hash map and a linked list working together, proved correct by assertions and measured against a naive version.
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