Rust by Example

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);

}

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