JavaScript Variables Documentation
1. Introduction
Welcome to the documentation for JavaScript Variables. This section provides an overview of the Variables and their functionality.
2. var Declaration
var is function-scoped and is hoisted to the top of its containing function, meaning it can be used before its declaration. However, it doesn't have block-scoping, leading to potential issues in certain situations.
var x = 5;
3. let Declaration
let is block-scoped, meaning it's limited to the block, statement, or expression where it is defined. It doesn't hoist the variable declaration, providing more predictable behavior and reducing potential bugs.
let y = 'Hello';
4. const Declaration
const is also block-scoped and, like let, does not hoist the
variable declaration. The key difference is that once a value is assigned
to a const, it cannot be reassigned. It is used for values
that should not be changed during the program's execution.
const PI = 3.14;
Data Types
