Async Demo

asyncpromise.js

// adding the 'async' keyword in front of a function will make it asynchronous. 
// JS will automatically turn the output into a Promise
async function sayHello(){
  return 'Hello"
}

sayHello().then((response) => {
  console.log(response) // expected output: 'Hello'
})

// Using 'await' will get the response of a Promise directly without using the then function.
// But this will execute the Promise synchronously, ie it will wait the promise to finish 
// before moving on to the next line.
let response = await sayHello();

console.log(response); // expected output: 'Hello'