What is std::async in C++?

Can you explain what std::async does in C++?

Sure! std::async is a function that allows you to run tasks asynchronously in C++. It returns a future that can be used to retrieve the result of the task.

How do I use std::async with a lambda function?

You can pass a lambda function to std::async like this: std::async([]{ return 42; });. This will run the lambda asynchronously.

What happens if I call std::async multiple times?

Each call to std::async creates a new task, and they can run concurrently. You can manage multiple tasks using futures.

Are there any drawbacks to using std::async?

Yes, one drawback is that it may introduce overhead due to thread management. It's important to consider the context of use.