Unlock the power of the extern keyword in C! In this advanced tutorial, we’ll explore how extern helps manage global variables, link multiple source files, and build modular programs. Perfect for students preparing for interviews, developers working on large projects, and anyone who wants to master scope and linkage in C. 📌 In this video you’ll learn: What the extern keyword means in C How extern enables variable sharing across multiple files Difference between declaration vs definition Common pitfalls and best practices with extern Real-world examples: multi‑file projects, header files, and modular design 💡 By the end, you’ll understand how to properly use extern to write cleaner, scalable, and professional C code. 👍 Like, 🔔 Subscribe, and 💬 Comment if you want more deep‑dive tutorials on C programming, file handling, and system‑level concepts.