Rust Brain Teasers

Puzzle 6

Please Reboot the Universe

reboot_universe/src/main.rs

fn main() {
    if 0.1 + 0.2 == 0.3 {
        println!("Arithmetic still works.");
    } else {
        println!("Please reboot 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:

Please reboot the universe.

Discussion

You would expect 0.1 + 0.2 to equal 0.3—it does, but not in floating-point ...