Experimenting on 09_strings/strings1.rs

[neerajnangiredddy]

fn current_favorite_color() -> str {
    "blue"
}

fn main() {
    let answer = current_favorite_color();
    println!("My current favorite color is {answer}");
}

why the above code doesn't work?.
why can't the compiler know the size of hard coded string "blue".

[mo8it]

String literals like "blue" have the type &str. You can think of them as being borrowed from a fixed space in memory, but they are valid until the program terminates. You need to change the return type to &str.