Async Await and Futures

Async Await and Futures\n\nA Future is a value that may not have completed yet. The await keyword drives it to completion.\n\nrust\nuse std::future::Future;\n\nfn simple_future() -> impl Future<Output = i32> {\n async { 42 }\n}\n\n#[tokio::main]\nasync fn main() {\n let value = simple_future().await;\n println!(\"Future resolved to {}\", value);\n}\n\n