Concatenation str with str

• In the example we have two strings hard-coded in the binary of our executable.

fn main() {
    let str1 = "Hello";
    let str2 = "World";

    // let text = str1 + str2; // cannot add `&str` to `&str`
    let text = str1.to_owned() + " " + str2;
    println!("{}", text);
}

Hello World