A Future in Rust is a placeholder for a computation that will complete later, enabling non-blocking asynchronous code.
A Future in Rust is a placeholder for a value that will be available later, representing a computation that hasn't finished yet. You create one by using the async keyword on a function or block, which returns a Future that must be polled by an executor to complete.
use std::future::Future;
async fn fetch_data() -> String {
"data".to_string()
}
fn main() {
let future: impl Future<Output = String> = fetch_data();
}
A Future is like a promise that a task will be done eventually, but not right now. It allows your program to start a long-running job, like downloading a file, and do other things while waiting for it to finish. Think of it as ordering food at a restaurant; you get a ticket (the Future) and can wait at your table instead of standing in the kitchen.