String slice in Rust

examples/string-slice/src/main.rs

fn main() {
    as_str();
    println!("---");
    as_string();
}

fn as_str() {
    let mut text = "The black cat climbed the green tree";
    println!("{}", text);
    println!("{}", &text[4..9]);
    println!("{}", &text[4..31]);

    {
        let text = &text[4..31];
        println!("{}", text);
    }

    println!("{}", text);

    {
        text = &text[4..25];
        println!("{}", text);
    }
    println!("{}", text);
}

fn as_string() {
    let mut text = String::from("The black cat climbed the green tree");
    println!("{}", text);
    println!("{}", &text[4..9]);
    println!("{}", &text[4..31]);

    {
        let text = &text[4..31]; // here text is going to be &str till the end of the block
        println!("{}", text);
    }

    println!("{}", text);

    {
        text = text[4..25].to_owned();
        println!("{}", text);
    }
    println!("{}", text);
}

examples/string-slice/out.txt

The black cat climbed the green tree
black
black cat climbed the green
black cat climbed the green
The black cat climbed the green tree
black cat climbed the
black cat climbed the
---
The black cat climbed the green tree
black
black cat climbed the green
black cat climbed the green
The black cat climbed the green tree
black cat climbed the
black cat climbed the