A String Slice Borrows Part of Existing String Data

A string slice lets us work with some or all of a string without creating another owned String. The type of a string slice is &str in source

let message = String::from("Server started");
let first_word = &message[0..6];

Here, the first_word doesn’t own another copy of “Server”, it refers to the first six bytes inside message

We can borrow the entire string as a slice too:

let message = String::from("Server started");
 
let whole: &str = &message[..];
let part: &str = &message[0..6];

A string literal is also a &str:

let message: &str = "Server started";