//JavaScript Array

const language = [

"HTML", "CSS", "JavaScript", "PHP", true, 50

]; //recommend

const language2 = new Array(

"HTML", "CSS", "JavaScript", "PHP", true, 50

); // Execution time long (not recommend)

console.log(language[2]); //JavaScript

//change arrays value

language[4] = "Tailwind CSS"

language[5] = "React.js"

//add new items

language[6] = "Vue.js"

language[10] = "Laravel"

console.log(language);

//convert to string

console.log(language.toString());

//check items number

console.log(language.length);

//first item

console.log(language[0]);

//last item

console.log(language[5]);

//fixed last item

console.log(language[language.length - 1]);

//NOT RECOMMENDED

const person = [];

person['firstName'] = 'Sahin';

person['lastName'] = 'Enam';

person[0] = 35;

console.log(person);

console.log(person.length);

console.log(person.firstName);

console.log(person.lastName);

//new Array [NOT RECOMMENDED]

const number = [20];

const number1 = new Array(20, 21);

console.log(number);

console.log(number1);

//Some Array Method

console.log(language.at(5));

console.log(language.join(" * "));

//delete or remove last item

console.log(language[language.length - 1]);

language.pop();

//add

language.push('Angular.js');

language.unshift('UI');

const x = [1, 2, 3, 4, 5];

const y = [1, 2, 3, 4, 5];

const z = [x.concat(y)];

console.log(z);

const a = [

[1, 2, 3],

[1, 2, 3],

[1, 2, 3],

];

console.log(a);

console.log(a.flat());