Async/Await Syntax

async function example() {
  const a = await Promise.resolve(1);
  const b = Promise.resolve(2);
  const c = 3;
  return a + await b + c;
}

await is required for all Promises
await can be omitted for some Promises
This demonstrates flexible await usage: 1) await is only needed when you need the Promise's value, 2) Promises can be created and passed without await, 3) await can be used multiple times in an expression, 4) Non-Promise values are unaffected by await, 5) Unnecessary await operations can impact performance, 6) Best practice is to only await when the value is needed.
await works with non-Promises
await always returns a Promise