How can I put the current thread to sleep?

Question

There is so much outdated information, it is really hard to find out how to sleep. I'd like something similar to this Java code:

Thread.sleep(4000); 

Answer 1

Rust 1.4+

Duration and sleep have returned and are stable!

use std::{thread, time::Duration};  fn main() {     thread::sleep(Duration::from_millis(4000)); } 

You could also use Duration::from_secs(4), which might be more obvious in this case.

The solution below for 1.0 will continue to work if you prefer it, due to the nature of semantic versioning.

Rust 1.0+

Duration wasn't made stable in time for 1.0, so there's a new function in town - thread::sleep_ms:

use std::thread;  fn main() {     thread::sleep_ms(4000); }