HELLO CRUSTACEANS, Here is an new idea for an semi new function in rust

here is the damn code hope i make it official in the new update 
fn input() -> String{
    print!(":");
    io::stdout().flush().expect("");
    let mut a = String::new();
    io::stdin()
    .read_line(&mut a)
    .expect("error");
    a.trim().to_string()
}