MERN Tutorial #3 — JavaScript Data Types (Primitive & Non Primitive)

Welcome to Video 3 of the MERN Stack Full Course (Beginner to Advanced)! In this video, we deep dive into the core fundamentals of JavaScript—concepts you must understand before learning Node.js or React. 🔥 Topics Covered in This Video ✔️ JavaScript Variables  ◾ var vs let vs const  ◾ Scope, re-declaration, hoisting  ◾ Best practices for MERN developers  ◾ Real code examples ✔️ Primitive Data Types  ◾ string  ◾ number  ◾ boolean  ◾ null  ◾ undefined  ◾ symbol  ◾ bigint  ◾ How JavaScript stores primitives in memory ✔️ Type Conversion & Type Coercion  ◾ Explicit vs implicit conversion  ◾ Converting strings to numbers  ◾ Boolean conversion  ◾ Truthy & Falsy values  ◾ Common coercion pitfalls 🎯 After this video, you will be able to: 🔹 Choose the correct variable declaration (var/let/const) 🔹 Understand all JavaScript primitive data types 🔹 Handle type conversion safely 🔹 Avoid unexpected behavior due to coercion 🔹 Become stronger in the JS fundamentals required for MERN 🗓️ Next Video in the Series: 👉 JavaScript Operators (Arithmetic, Logical, Comparison, Ternary, Short-Circuiting) 💬 Support the Series If you're learning and enjoying this MERN course, LIKE, COMMENT, and SUBSCRIBE to stay updated with new videos and upcoming AI-powered full-stack projects! JavaScript data types, JavaScript variables, var let const explained, var vs let vs const, JS primitive types, JavaScript primitive data types, JavaScript type conversion, JavaScript type coercion, JS truthy falsy, JavaScript beginner tutorial, MERN tutorial video 2, MERN JavaScript basics, JavaScript full course 2025, learn JavaScript for MERN, JavaScript basics for beginners, JavaScript ES6 variables, JavaScript null undefined, string number boolean JS, JavaScript symbol bigint, JavaScript hoisting var let const, JavaScript coding tutorial, MERN stack from scratch, MERN stack free course, JavaScript interview questions JavaScript implicit conversion, JavaScript explicit conversion, JavaScript data type examples, JS beginner concepts, MERN stack roadmap 2025, JavaScript explained simply, JavaScript free playlist, full stack MERN JavaScript basics #JavaScript #MERNStack #WebDevelopment #Programming #LearnJavaScript #FullStackDeveloper #NodeJS #ReactJS