JavaScript var vs let vs const: A Quick Guide

var vs let vs const — JavaScript fundamentals 🔑 A small concept, but very important for writing bug-free code. Quick breakdown 👇 var ❌ Function scoped ❌ Can be re-declared ❌ Hoisted with undefined let ✔ Block scoped ✔ Can be re-assigned ❌ Cannot be re-declared const ✔ Block scoped ❌ Cannot be re-assigned ✔ Safer by default Best practice: Use const by default, let only when value changes, avoid var in modern JavaScript. Strong fundamentals = fewer bugs 🚀 #javascript #frontenddeveloper #webdevelopment #coding #learning #reactjs #softwareengineering

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