What is the difference between async/await and Promise?

async/await is syntactic sugar over promises. It allows writing asynchronous code in a more readable, synchronous style, using the async keyword for functions, inside which await is used to wait for the promise to resolve. Promises are objects representing the eventual completion (or failure) of an asynchronous operation and its resulting value.

Feature	async/await	Promise
Syntax	More similar to synchronous code.	Uses .then(), .catch(), .finally() methods.
Readability	Often higher, especially in chains.	Can lead to "Callback hell" in complex chains.
Error handling	Uses standard try...catch.	Uses .catch() or the second argument in .then().
Parallelism	Requires explicit use of Promise.all() or Promise.allSettled().	Can be more explicit but less readable without async/await.

// Promise example
function getDataPromise() {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      resolve('Data received');
    }, 1000);
  });
}

getDataPromise()
  .then(data => {
    console.log(data);
  })
  .catch(error => {
    console.error(error);
  });

// async/await example
async function getDataAsync() {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      resolve('Data received');
    }, 1000);
  });
}

async function processData() {
  try {
    const data = await getDataAsync();
    console.log(data);
  } catch (error) {
    console.error(error);
  }
}

processData();