Insert Node After Specific Node in Linked List | C Programming DSA Tutorial
Inserting a node in the middle of a Linked List is a classic Data Structures problem. In this tutorial, we learn how to insert a new node immediately after a specific value (e.g., inserting 40 after 20).
This process involves two main phases: Searching for the target node and Re-linking the pointers. We walk through the logic of why the order of pointer assignment matters and implement the complete C code from scratch.
Key Concepts Covered:
✅ Searching for a specific value in a Singly Linked List.
✅ The while loop with a break condition for target nodes.
✅ Why newnode-next must be assigned before temp-next.
✅ Preventing memory leaks and "broken" chains.
✅ Complete code walkthrough and debug session.
📍 Timestamps:
00:00 - Introduction to Mid-List Insertion
00:51 - Visualizing the Goal: Inserting 40 after 20
02:13 - The Two Crucial Changes: Redefining the links
03:26 - Modifying the C Code for Mid-List Insertion
04:37 - Step 1: Getting the Target Value from the User
05:30 - Step 2: The Search Loop with break Statement
07:08 - The Linking Logic: Stitching the new node in
09:23 - Common Bug: Forgetting to reset the temp pointer
10:13 - Debugging the code (Missing jump statement)
11:15 - Live Demo: Inserting into the middle of the list
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