Can you explain how asynchronous task execution is implemented using async/await?

The async/await construction in Python is used to simplify working with asynchronous code, allowing it to be written in a synchronous style. A function declared with async returns a coroutine, which can be executed using await, pausing execution until the asynchronous operation completes.

Example:

import asyncio

async def say_hello():
    await asyncio.sleep(1)  # simulate an asynchronous operation
    print('Hello')

async def main():
    await say_hello()

asyncio.run(main())

Here, await pauses the execution of the main function until say_hello completes, without blocking the entire thread.