# Returning from loops

One of the uses of a `loop` is to retry an operation until it succeeds. If the operation returns a value though, you might need to pass it to the rest of the code: put it after the `break`, and it will be returned by the `loop` expression.

    fn main() {
        let mut counter = 0;

        let result = loop {
            counter += 1;

            if counter == 10 {
                break counter * 2;
            }
        };

        assert_eq!(result, 20);
    }