Variables

#javascript #variables #var #let

Variables in JavaScript are containers for storing data values.
They are declared using the var, let, or const keywords.
Variables declared with var have function scope or global scope, while those declared with let or const have block scope.
It's recommended to use let or const for variable declarations to avoid issues related to scope and hoisting.

// Variable declaration with var (function-scoped)
var firstName = "John";
console.log(firstName); // Output: John

// Variable declaration with let (block-scoped)
let lastName = "Doe";
console.log(lastName); // Output: Doe

// Variable declaration with const (block-scoped constant)
const age = 30;
console.log(age); // Output: 30