Asynchronous Data in Node

node-Asynchronous-Data.js

//js executed in the sequence they are called
function myFirst() {
  myDisplayer("Hello");
}

function mySecond() {
  myDisplayer("Goodbye");
}

myFirst();
mySecond();

//

let a = 20;
let b = 0

setTimeout(()=>{
 b = 20
}, 1000)

console.log(a+b)

-----------------------------------------------------------------------------------
let a = 20;
let b = 0
  let waitingData = new Promise((resolve, reject)=>{
  setTimeout(()=>{
    resolve(50)
  }, 2000)
  
})

waitingData.then((data)=>{
  console.log(a+data)
})