What is let in javascript

let allows you to declare variables that are limited to the scope of a block statement, or expression on which it is used, unlike the var keyword, which declares a variable globally, or locally to an entire function regardless of block scope.

What is let and var in JavaScript?

var and let are both used for variable declaration in javascript but the difference between them is that var is function scoped and let is block scoped. Variable declared by let cannot be redeclared and must be declared before use whereas variables declared with var keyword are hoisted.

Is Let better than VAR?

The Scope of a 'let' Variable\n\n Block scoping lets you have two variables with the same name in different scopes. Now, instead of redeclaring the num, both num variables are treated as different variables in their own scopes. This makes let a better choice than var.

Can you use let in JavaScript?

The first thing we've learnt is that for most purposes, var and let aren't strictly necessary in JavaScript. Roughly speaking, scoping constructs with lexical scope can be mechanically transformed into functional arguments.