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- JavaScript var Vs let Vs const
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Difference Between var, let, and const in JavaScript
This article is created to differentiate between var, let, and const in JavaScript. These three are the keywords, used to declare a variable in JavaScript.
var Vs let Vs const in JS
var | let | const |
---|---|---|
declares function-scoped or globally-scoped variable | declares block-scoped local variable | declares block-scoped variable |
can be updated and re-declared | can be updated but cannot be re-declared | neither can be updated nor be re-declared |
can be declared without initializing any value | can be declared without initializing any value | can not be declared without initializing any value |
Note - Accessing a variable declared using var keyword without initialization, returns undefined.
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