vladislavaSim

const uahEntered = prompt('please, enter UAH');
const eurEntered = prompt('please, enter EUR');

const uahToUsd = uahEntered/26.5;
const eurToUsd = eurEntered/1.15;
const totalUsd = uahToUsd + eurToUsd;
alert(`total amount in USD is ${totalUsd.toFixed(2) }`);

//next

vladislavaSim

//  1)
function squareNum(n) {
   return Math.pow(2, n)
}
console.log('square number is ' + squareNum(5)); //32

//  2)
function getFactorial(n) {
   let x = 1;
   for(let i = 1; i <= n; i++) {

vladislavaSim

// Task 802
const text = '2 lorem ipsum 1 dolor 64867789652 si amet 22';

function findNums(str) {
   let arr = str.split(' ');
   const numsArr = arr.filter((item) => {
       return item.search(/[0-9]/g) !== -1 ? item : null
   })
   let maxLength = 0;
   numsArr.map((item) => {

vladislavaSim

//make a sting '1+2+3+4'
let nums = ['1', '2', '3', '4'];

function join1(nums) {
   return nums.join('+');
}

console.log(join1(nums));

vladislavaSim

// showing object info 
 let dog = {
    name: 'Ronnie',
     breed: 'chihuahua',
     weight: 2.1,
     color: 'white-red',
     age: 5
 };
for(let feature in dog) {
    let info = feature + dog[feature];

vladislavaSim

//make an object where keys are symbols and values are numbers how many times those symbols are used in the string

let str = 'Ave Maria, gratia plena, Dominus tecum, benedicta tu in mulieribus et benedictus fructus ventris tui Jesus'
let arr = str.split('');                    //transform the string into array splitting on every symbol

let counter = {};                           //assign the empty object

for(let item of arr) {                      //iterate every symbol in the array
    if(counter[item] === undefined) {       //if there are no such key yet
        counter[item] = 1                   //then we assign this key with value 1

vladislavaSim

let str = 'I learn JavaScript!';
console.log(str.length);

console.log(str.substr(2, 5));
console.log(str.substring(2, 7));
console.log(str.slice(2, 7));

console.log(str.indexOf('learn'));

const string = 'Чтобы избавиться от лишнего веса, нужно всего лишь не жрать';

vladislavaSim

//counters for 2 and 3 in array

let arr = [1, 2, 3, 2, 4, 3, 5,
    6, 3, 2, 3];
let counterThree = 0;
let counterTwo = 0;

for(let i of arr) {
    if(i === 3) {
        counterThree++

vladislavaSim

let arr = [2, 5, 9, 15, 0, 4];

let result = [];

for(let i = 0; i < arr.length; i++) {
    if(arr[i] > 3 && arr[i]< 10) {
        result.push(arr[i])
    }
}
console.log(result);

vladislavaSim

//1
function countCalls() {
    let count = 0;
    return function() {
        return count += 1
    }
}
let counter = countCalls();
console.log(counter())
console.log(counter())