Rust 1.33.0

# Strings

There is a new edition of the book and this is an old link.

> A `String` is allocated on the heap and as such is able to store an amount of text that is unknown to us at compile time. You can create a `String` from a string literal using the `from` function. A string slice is a reference to part of a `String`.

    let s = String::from("hello world");

    let hello = &s[0..5];
    let world = &s[6..11];Run

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