Calculating String length and width – Fun with Unicode
tomdebruijn.com
Finding the string length sounds easier than it is, if we want to be really accurate. Let's explore how does Unicode and emoji make this step more complex.

Why use pi when you can use 🥧

fn main() {
    let pi_emoji = "🥧";
    let pi_value = 3.1415926535897932384626433832;

    println!("Let {} {:.28}", pi_emoji, pi_value);
}