function outerFunction() {  let count = 0;  return function innerFunction() {    count++;    return count;  };}
const increment = outerFunction();console.log(increment()); // 1console.log(increment()); // 2

console.log(x); // undefinedvar x = 5;  // Only declaration is hoisted, not initialization

console.log("Start");setTimeout(() => console.log("Timeout"), 0);console.log("End");// Output: Start, End, Timeout

async function fetchData() {  try {    const response = await fetch('https://api.example.com/data');    const data = await response.json();    console.log(data);  } catch (error) {    console.error('Error:', error);  }}

const person = {  name: "John",  greet: function() {    console.log(`Hello, ${this.name}`);  }};
person.greet(); // Hello, John

function Animal(name) {  this.name = name;}
Animal.prototype.speak = function() {  console.log(`${this.name} makes a noise`);};
const dog = new Animal("Rex");dog.speak(); // Rex makes a noise

if (true) {  var x = 5;  // Accessible outside the block  let y = 10; // Block-scoped, only accessible inside the block}console.log(x); // 5console.log(y); // ReferenceError: y is not defined

const [a, b] = [10, 20];console.log(a); // 10
const person = { name: "Jane", age: 25 };const { name } = person;console.log(name); // Jane
const arr = [1, 2, 3];console.log(...arr); // 1 2 3

const numbers = [1, 2, 3, 4, 5];const doubled = numbers.map((num) => num * 2);console.log(doubled); // [2, 4, 6, 8, 10]

// module.jsexport const greet = () => console.log("Hello World");

// main.jsimport { greet } from './module.js';greet(); // Hello World