Question

How to use block as expression in Rust

Answer 1

fn main() {
    let x = 7u32;

    let y = {
        2 * x
    };

    println!("x = {:?}", x);
    println!("y = {:?}", y);
}





/*
run:

x = 7
y = 14

*/

 

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Answer 2

fn main() {
    let x = 7u32;

    let y = {
        let x_squared = x * x;
        let x_cube = x_squared * x;

        x_cube + x_squared
    };

    println!("x = {:?}", x);
    println!("y = {:?}", y);
}





/*
run:

x = 7
y = 392

*/

 

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