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// The modern version of a for loop, "for of” which does await for promises.
async function test() {
  const array = [2,1,3];

  for (const item of array) {
    let result = await doAsyncAction(item);
    console.log(result);
  }
}

test();

// Traditional loop
async function test() {
  const array = [2,1,3];
  for (let i = 0; i < array.length; i++) {
    let result = await doAsyncAction(array[i]);
    console.log(result);
  }
}

test();

// common function for example ;-)
function doAsyncAction(num) {
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve(num + 'a');
    }, 2000);
  });
}