//TODO Variables and Types

// console.log(myName); // ReferenceError, myName is not defined

let myName; // undefinded

console.log(myName);

myName = "Bogdan"; // Bogdan

console.log(myName);

// link types (objects)

const objectA = {

a: 10,

b: true,

};

objectA.a = false; // a = false

objectA.c = "text content"; // new variable created

console.log(objectA);

//TODO primitive types are behaving like objects.

const myLocation = "Los Angeles"

console.log(myLocation.toUpperCase())

const spareLocation = new String("San Jose")

console.log(spareLocation)

//TODO there are 6 primitive types: boolean, number, string, null, undefined, symbol

// there is 1 link type: object

// JavaScript is a dynamically typed language, meaning that you don't have to specify the type of a variable when you declare it.

//TODO Rules to work with variables

// 1. Declare before usage

// 2. Try to use "const" as much as it possible

// 3. Inside of functions do not change the value of global variables