var vs let vs const in JavaScript | JavaScript Interview Series Part 3 #javascript #coding

Welcome to Part 3 of the JavaScript Interview Series 🚀 In this video, we will understand the difference between var, let, and const in JavaScript, which is one of the most frequently asked JavaScript interview questions. Before ES6 (2015), developers mostly used var to declare variables in JavaScript. However, var had several problems such as redeclaration, scope issues, and hoisting behavior, which could lead to unexpected bugs in real applications. To solve these problems, ES6 introduced let and const, which provide better scope control, safer variable declarations, and more predictable behavior. In this video we will cover: • Problems with var • Redeclaration and reinitialization • Function scope vs Block scope • Hoisting behavior • Temporary Dead Zone (TDZ) • Why let and const are preferred in modern JavaScript • Real coding examples for interview preparation This video will help you clearly understand the concept and confidently answer this question in JavaScript interviews. ⏱️ Timestamps 00:00 Introduction 00:23 var in JavaScript 04:46 let in JavaScript 09:25 const in JavaScript 13:03 Problems with var 14:39 Summary: var vs let vs const 📚 JavaScript Interview Series This series covers the most asked JavaScript interview questions with clear explanations and practical examples. Upcoming videos will cover topics like Hoisting, Closures, Event Loop, Execution Context, Promises, and Async/Await. If you want to crack JavaScript interviews and become a better developer, make sure to follow this JavaScript Interview Series. #javascript #javascriptinterview #varletconst #javascriptdeveloper #webdevelopment #frontenddevelopment #nodejs #javascriptconcepts #codinginterview #jsinterviewquestions