Var, Let, and Const in JavaScript

Types of variables

• Var --> function scoped
• Let --> block scoped
• Const --> block scoped

Var

When a Var variable is declared outside the function , it becomes globally scoped .

If they are inside a function we only can access them inside the function.

goodbye variable isfunction-scoped as it's limited to that function only. An example of the same is given below👇👇👇 One of the issues with using the var keyword is they can be redeclared inside the same scope.

Let

let variables are block-scoped.also , they can not be redaclared. Like var, a let variable and its value can be updated in the same scope. but, we can’t redeclare a let variable.

It is generally used inside the loops & conditional blocks .👇👇👇

Const

The variables associated with the const are the block scoped variable.

They can be only accessed within the block of code.

Const variables cannot be updated or redeclared. 👇👇👇

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