Rust Brain Teasers

Puzzle 18

Mutable Immutables

mutable_immutable/src/main.rs

fn main() {
    let life_the_universe = &mut 41;
    *life_the_universe += 1;
    println!("Life, the Universe and Everything: {}", life_the_universe);
}

Guess the Output
	Try to guess what the output is before moving to the next page.

The program will display the following output:

Life, the Universe and Everything: 42

Discussion

The surprising part of this teaser is that the life_the_universe ...