🧠 Mastering let, var, and const in JavaScript — Beginner to Advanced Guide with Real Interview Questions

Featurevarletconst ScopeFunctionBlockBlock HoistingYes (initialized to undefined)Yes (but not initialized — TDZ)Yes (not initialized — TDZ) Re-declaration✅ Allowed❌ Not allowed❌ Not allowed Re-assignment✅ Allowed✅ Allowed❌ Not allowed (binding ...