What is difference between sync and async function?

async vs sync function

Synchronous Functions:

• Execute code line by line, in sequence
• Each operation must complete before moving to the next one
• Block the execution of other code while running

function makeSandwich() {
  let bread = getBread(); // Must complete before moving on
  let cheese = getCheese(); // Waits for bread first
  let sandwich = bread + cheese;
  return sandwich;
}

Asynchronous Functions:

• Allow other code to run while waiting for operations to complete
• Don't block execution
• Often used for operations that might take time (API calls, file operations, etc.)
• Use keywords like async and await, or work with Promises

async function orderFood() {
  console.log('Ordering food...');

  try {
    // await lets us wait for the promise to resolve
    const food = await fetch(
      'https://api.restaurant.com/order'
    );
    console.log('Food has arrived!');
    return food;
  } catch (error) {
    console.log('Error ordering food:', error);
  }
}

// This code runs while food is being ordered
console.log('Doing other things while waiting for food...');