How to Find FIRST & FOLLOW in Grammar | Compiler Design | Parsing Techniques

In this video, we explore FIRST and FOLLOW Sets in Grammar, which are essential for Top-Down and Bottom-Up Parsers in Compiler Design. Understanding FIRST and FOLLOW helps in constructing LL(1) Parsing Tables, SLR(1), LR(1), and LALR(1) Parsers. 🔹 What You’ll Learn: ✅ Introduction to FIRST & FOLLOW Sets 🔸 Why are FIRST & FOLLOW sets necessary in Syntax Analysis? 🔸 How do they help in Predictive Parsing & LR Parsing? ✅ Step-by-Step Calculation of FIRST Set 🔸 Rules for computing FIRST sets. 🔸 Handling epsilon (ε) in FIRST set. ✅ Step-by-Step Calculation of FOLLOW Set 🔸 Rules for computing FOLLOW sets. 🔸 Handling cases with multiple derivations. ✅ Example Walkthrough: 🔸 Given a Context-Free Grammar (CFG), we will compute FIRST & FOLLOW step by step. 🔸 Demonstrating how to apply these sets to Parsing Table Construction. ✅ Applications of FIRST & FOLLOW in Parsing 🔸 LL(1) Parsing Table Construction. 🔸 SLR(1), CLR(1), and LALR(1) Parsing Table Construction. ✅ Final Conclusion: 🔸 Why FIRST & FOLLOW sets are the foundation of Parser Construction? 🔸 Encouragement to watch upcoming videos on LL(1), LR Parsing & Predictive Parsing Table Generation. 📌 This video is perfect for students learning Compiler Design, Predictive Parsing, and Grammar Analysis Techniques. 📌 Like, Share & Subscribe for More Compiler Design Tutorials! 🚀