Lifetimes and References

String Slice

Borrowing Part of Text

A string slice borrows a range of bytes from existing text. The borrowed slice cannot outlive the original string.

Program

Play the program to choose how much of a word is borrowed as a slice.

string_slice.rs 
fn main() {
    let text = "rustacean";
    let take = ;
    let part = &text[..take];
    println!("{part}");
}

fn main() {
    let text = "rustacean";
    let take = ;
    let part = &text[..take];
    println!("{part}");
}

fn main() {
    let text = "rustacean";
    let take = ;
    let part = &text[..take];
    println!("{part}");
}
string slice `&text[..take]` borrows part of the string data.
borrowed view The slice points into `text`; it does not allocate a new string.
valid boundary Slice indexes must land on UTF-8 character boundaries.