Strings

String is the dynamic heap string type. When you need to modify or own the string. str is an immutable sequence of UTF-8 characters. A 'slice' of string data. Used behind a reference as &str.

To make a String from a &str: String::from("foo") or "foo".to_string() or let foo: String = "Hello world".into()

#![allow(unused)]
fn main() {
let data: String = "hello".into();    

let s1: &str = &data;    
let s2: &str = &data;    
let s3: &str = &data;
}

Literal Strings

#![allow(unused)]
fn main() {
r#"String content with " and / and \ and whatever"#;
}

Modifying Strings

String is mutated via .push_str(&str).