Get first last element in Rust 1.55

In Rust 1.55, you can get the first and last element of an array using indexing.

To get the first element of an array, you can use the index [0]. For example:

let array = [1, 2, 3, 4, 5];
let first_element = array[0];
println!("The first element is: {}", first_element);

This would output The first element is: 1.

To get the last element of an array, you can use the index array.len() - 1. For example:

let array = [1, 2, 3, 4, 5];
let last_element = array[array.len() - 1];
println!("The last element is: {}", last_element);

This would output The last element is: 5.

Alternatively, you can use the first() and last() methods available in Rust's standard library. For example:

let array = [1, 2, 3, 4, 5];
let first_element = array.first().unwrap();
let last_element = array.last().unwrap();
println!("The first element is: {}", first_element);
println!("The last element is: {}", last_element);

This would output:

The first element is: 1
The last element is: 5