let mut v = vec![0];
println!("element at index {} is {}", 0, vec[0]);

let a: [i32; 5] = [1, 2, 3, 4, 5];


let months = ["January", "February", "March", "April", "May", "June", "July",
              "August", "September", "October", "November", "December"];

// these two are the same
let a = [3, 3, 3, 3, 3];
let a = [3; 5];

let first = a[0];
let second = a[1];

let long_tuple = (1u8, 2u16, 3u32, 4u64,
                      -1i8, -2i16, -3i32, -4i64,
                      0.1f32, 0.2f64,
                      'a', true);

// Values can be extracted from the tuple using tuple indexing
println!("long tuple first value: {}", long_tuple.0);
println!("long tuple second value: {}", long_tuple.1);

// long Tuples cannot be printed
// let too_long_tuple = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13);
// println!("too long tuple: {:?}", too_long_tuple);
// TODO ^ Uncomment the above 2 lines to see the compiler error

fn reverse(pair: (i32, bool)) -> (bool, i32) {
    // `let` can be used to bind the members of a tuple to variables
    let (integer, boolean) = pair;

    (boolean, integer)
}

const A:char = 'a';

let hello = "hello";

let mut hello = String::from("hello");
hello.push('W');
hello.push_str("orld!");

fn main() {
    // this is a statement
    let a = 1;

    // this will error
    // the statement `let y = 6` does not return anything
    let x = (let y = 6);
}

fn main() {
    let y = {
        let x = 3;
        // notice the lack of `;`
        // this is a valid expression
        x + 1
    };

    println!("The value of y is: {}", y);
}