EPISODE 1 – var vs let vs const

This video explains the differences between var, let, and const in JavaScript and why choosing the right variable type matters in real-world development.

JavaScript provides three ways to declare variables, but they behave very differently.

• var is function-scoped and can be accessed outside blocks, often leading to unexpected bugs and poor code maintainability.
• let is block-scoped, making it safer and more predictable when used inside loops or conditional statements.
• const is also block-scoped and does not allow reassignment, helping developers write stable and error-free code.

Because of these differences, modern JavaScript development depends on let and const, while var is generally avoided in professional projects.

This video helps beginners and aspiring developers understand not just the syntax, but the practical reasoning behind using let and const in production-level code.