Array of strings - access element by index

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• To allow us to change the values in the array we have to make it mutable using mut.
• In most cases there is no need to decalre the type of the values and the length. Rust can infer.

examples/arrays/strings/src/main.rs

fn main() {
    let mut animals = ["cat", "snake", "fish"];
    println!("{animals:?}");

    println!("{}", animals[1]);
    animals[1] = "crab";

    println!("{animals:?}");
}

["cat", "snake", "fish"]
snake
["cat", "crab", "fish"]