array.js

const readlineSync = require('readline-sync');
 
function createArray(N) {
	let newArr = [];
	for (let i = 1; i <= N; i++) {
        let num = readlineSync.question("enter the number");
		newArr.push(num);
	}
	return newArr;
}

let N = readlineSync.question("enter the number");
let arr = createArray(N);
console.log(arr);
//**********************************************
 
function createArray(N) {
	let newArr = [];
	for (let i = 0; i < N; i++) {
        let num = readlineSync.question("Enter the number: ");
		newArr.push(num);
	}
	return newArr;
}

let N = parseInt(readlineSync.question("Enter the number of elements: "));
let arr = createArray(N);
console.log("Array in reverse order:");
for (let i = N - 1; i >= 0; i--) {
    console.log(arr[i]);
}
//******************************************
let cities = ["delhi", "agra", "mumbai",];
for(let city of cities){
    console.log(city.toUpperCase());
}
//******************************** *
let marks = [23,56,67,45,78,];
let sum =0;
for(let val of marks){
sum += val;
}
let avrage = sum/marks.length;
console.log(`avrage marks of a class = ${avrage}`);
//*******************************
let items = [200,50,234,45,];
let i=0;
for(let val of items){
    let offer = val/10;
    items[i] = items[i]-offer;
    console.log(`value after offer ${items[i]}`);
    i++;
}
//**********************************************
let items = [200, 50, 234, 45];
for(let i=0; i<items.length; i++){
    let offer = items[i]/10;
    items[i] -= offer;
    }
    console.log(items);
//****************************** 
push methods
let fooditems = ["apple", "pateto", "tameto", "banana"];
fooditems.push("chips", "lichhi");
console.log(fooditems);
//*************************************************** 
//deleted methods
let fooditems = ["apple", "pateto", "tameto", "banana"];
fooditems.pop();
console.log(fooditems);
//*****************************************************
to strings methods
let fooditems = ["apple", "pateto", "tameto", "banana"];
fooditems.toString();
console.log(fooditems);
//*********************************************************
let fooditems = ["pateto", "tameto", "banana"];
let fruits = ["apple", "banana", "lichhi"];
let items = fooditems.concat(fruits);
console.log(items);
//****************************************************
unshift methods shift start
let fooditems = ["apple", "pateto", "tameto", "banana"];
fooditems.unshift("lemon");
console.log(fooditems);
//*****************************************
//shift delete start 
let fooditems = ["apple", "pateto", "tameto", "banana"];
fooditems.shift();
console.log(fooditems);
//**********************************************
//slice methods
let fooditems = ["apple", "pateto", "tameto", "banana"];
console.log(fooditems.slice(1,3));
//***************************************
// splice methods add remove elements
let arr = [1,2,34,5,6,7,8,9];
arr.splice(1,0, 123);
console.log(arr);
//*****************************************
//delete element
let arr = [1,2,34,5,6,7,8,9];
arr.splice(3,1);
console.log(arr);
//************************************************
//replace elements
let arr = [1,2,34,5,6,7,8,9];
arr.splice(3,1, 123);
console.log(arr);
//******************************************** 
//create an array to store compnies"
let compniesname = ["bloomberg", "microsoft", "uber","google"];
compniesname.shift();
console.log(compniesname);
//************************************************
//replace element
let compniesname = ["bloomberg", "microsoft", "uber","google"];
compniesname.splice(2,1,'ola');
console.log(compniesname);
//*************************************************** 
//add element end
let compniesname = ["bloomberg", "microsoft", "uber","google"];
compniesname.push('amezon');
console.log(compniesname);