Async and await

[sahithya]

Async and await are JavaScript features simplifying asynchronous operations. async declares a function that implicitly returns a Promise. await pauses the execution of an async function until a Promise settles (resolves or rejects), making asynchronous code look and behave more like synchronous code, improving readability and maintainability.

[agratripspack]

������ Understanding Async & Await

async and await are modern JavaScript features that make working with asynchronous code easier and more readable.

������ 1. async Function

Declares a function as asynchronous.

Always returns a Promise, even if you return a normal value.

Example:

async function fetchData() {
return "Hello World";
}
fetchData().then(console.log); // Output: Hello World


������ 2. await Keyword

Can only be used inside an async function.

Pauses the execution of the function until a Promise is resolved.

Makes asynchronous code look synchronous, improving readability.

Example:

async function getUser() {
let response = await fetch('https://api.example.com/user');
let data = await response.json();
console.log(data);
}
getUser();


������ Why Use Async/Await?

Easier to read than .then() chains.

Simplifies error handling with try/catch.

Keeps asynchronous code clean and maintainable.

������ Error Handling Example:

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


������ In short:

async = declares an asynchronous function (returns a Promise).

await = waits for the Promise to resolve before continuing execution.

[leenahahim]

Async and await are tools in programming that help execute tasks one by one without stopping the entire program. They make it easier to work on things that take time, such as loading data from the Internet, by waiting for tasks to finish before continuing.