https://www.freecodecamp.org › news › var-let-and-const-whats-the-difference

var declarations are globally scoped or function scoped while let and const are block scoped. var variables can be updated and re-declared within its scope; let variables can be updated but not re-declared; const variables can neither be updated nor re-declared.

https://www.geeksforgeeks.org › difference-between-var-let-and-const-keywords-in-javascript

Difference between var, let and const keywords in JavaScript. In JavaScript, we use var, let, and const to create variables. These keywords might seem similar at first, but they control how and where your variables work in your code. Let’s explore each one and how they differ from each other.

https://www.freecodecamp.org › news › differences-between-var-let-const-javascript

var and let create variables that can be reassigned another value. const creates "constant" variables that cannot be reassigned another value. developers shouldn't use var anymore. They should use let or const instead. if you're not going to change the value of a variable, it is good practice to use const. The first two points are ...

https://dev.to › codeparrot › javascript-var-vs-let-vs-const-key-differences-best-uses-17e7

In this blog, we've explored the key differences between var, let, and const—the three primary ways to define variables in JavaScript. We've seen how var is function-scoped and hoisted, but its quirks can lead to unintended behavior. On the other hand, let and const, introduced in ES6, offer block-scoping and greater predictability ...

https://stackoverflow.com › questions › 21237105

var and const have different scope rules. (You might have wanted to compare with let rather than var .) Specifically: const and let are block-scoped and, when used at global scope, don't create properties on the global object (even though they do create globals).

https://blog.javascripttoday.com › blog › var-vs-let-vs-const

In general, it is best to use let or const instead of var when declaring variables in JavaScript. let should be used for variables that may be reassigned, while const should be used for variables that should not be reassigned.

https://stackabuse.com › the-difference-between-var-let-and-const-in-javascript-and-best...

var english = "Hello there!"; let french = "Bonjour!"; const german = "Hallo!"; In this guide, we will explore the difference between the three various ways to declare variables in JavaScript - var, let and const, their scopes and when to choose which.

https://pauldcoder.hashnode.dev › let-vs-const-vs-var-when-and-how-to-use-them

Let's go through the differences between let, const, and var in JavaScript and understand when it's best to use each one.