Rust Brain Teasers

Puzzle 16

Double or Nothing

double_or_nothing/src/main.rs

fn double_it(n: i32) -> i32 {
    n * 2
}

fn double_it(n: f32) -> f32 {
    n * 2.0
}

fn main() {
    println!("2 * 4 = {}", double_it(2));
}

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

The program will fail to compile, and you’ll receive the following error message:

error[E0428]: the name "double_it" is defined multiple times