Code shared from the Rust Playground

playground.rs

fn main() {
    let cat = '😻'; // U+1F63B // UTF8: F0 9F 98 BB
    println!("val {} {:x?}", cat, cat as i32);
    
    let cat_str = String::from("😻");
    let cat_bytes = cat_str.as_bytes();
    println!("val {} {:x?}", cat_str, cat_bytes);
}

cat as i32 = 1f63b
cat_byes = [f0, 9f, 98, bb]