fn concatenate_strings(string1: &str, string2: &str) -> String
{ let mut result = String::new(); result.push_str(string1); result.push_str(string2); result }
fn main()
{ let string1 = String::from("Hello, "); let string2 = String::from("Rust!");
let concatenated_string = concatenate_strings( &string1, &string2 );
println!("{}", concatenated_string);
}