A Unicode escape represents a Unicode character inside a Rust string by placing its hexadecimal code point inside \u{}. section 2.10
Printing characters from code points
Convert characters such as Korean 행, H, 居, and Japanese い to hexadecimal u32 values, then print them again with escapes: println!("\u{D589}, \u{48}, \u{5C45}, \u{3044}").
fn main() {
println!("{:X}", '행' as u32); #1
println!("{:X}", 'H' as u32);
println!("{:X}", '居' as u32);
println!("{:X}", 'い' as u32);
println!("\u{D589}, \u{48}, \u{5C45}, \u{3044}"); #2
}
Compare hexadecimal code-point output with the corresponding Unicode escapes in a focused Rust listing. section 2.10
