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return expressions

Syntax
ReturnExpression :
return Expression?

Return expressions are denoted with the keyword return. Evaluating a return expression moves its argument into the designated output location for the current function call, destroys the current function activation frame, and transfers control to the caller frame.

An example of a return expression:

# #![allow(unused_variables)]
#fn main() {
fn max(a: i32, b: i32) -> i32 {
    if a > b {
        return a;
    }
    return b;
}
#}

© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/reference/expressions/return-expr.html