qodirovshohijahon

let result = 0;
let arr = [1, 2, 5, 4, 6, 1, 2, 5, 4];
for(let i = 0; i <= arr.length; i++){
        result = result ^ arr[i]; 
}
console.log(" this is an unique number " + result);

qodirovshohijahon

function reversedString (mystr) {
    let str = "";
    for(let i = mystr.length; i > 0; i--){
        str += i;    
    }
    return str;
}

qodirovshohijahon

function reversedStringWihtBuildinFunc(str) {
    return str.split("").reverse().join("");    
}

qodirovshohijahon

function reverseString (str) {
if(str === "") return ""; else
    return reverseString(str.substr(1)) + str.charAt(0);
}

qodirovshohijahon

function swappingUsingTwoVars(num1, num2) {
  num1 = num1 + num2;
  num2 = num1 - num2;
  num1 = num1 - num2;
return ("First number " + num1 + "\nSecond number " + num2);    
}

qodirovshohijahon

**
 * @param {number} n
 * @return {number}
 */
var subtractProductAndSum = function(n) {
 let num = n.toString().split("");
   let count = num.reduce((acc, sum)=>{
    acc += Number(sum);
       return acc;
}, 0);

qodirovshohijahon

**
 * @param {number} n
 * @return {number}
 */
var subtractProductAndSum = function(n) {
  let strNum = n.toString();
  let arr = strNum.split("");
  let mul = 1, count = 0;
  for (let i = 0; i < arr.length; i++) {
    mul *= arr[i];

qodirovshohijahon

var subtractProductAndSum = function(n) {
    if (n / 10 == 0)
        return 0;
    let mul = 1, sum = 0;
    while( n != 0) {
        mul *= n % 10;
        sum += n % 10;
        n = Math.trunc(n / 10);
    }
return mul - sum;

qodirovshohijahon

/**
 * @param {number} x
 * @return {boolean}
 */
var isPalindrome = function(x) {
    let str = "";
    let digit = x.toString();
    for(let i = digit.length - 1; i >= 0; i-- ) {
        str += digit[i];
    } 

qodirovshohijahon

/**
 * @param {number} x
 * @return {boolean}
 */
var isPalindrome = function(x) {
let sum = 0, n, m = x;
    if (x < 0) return false;
while (x != 0 ) {
    sum = sum * 10 + x % 10;; 
    x = Math.floor (x / 10);