use std::io;

fn main() {
    // example
    println!("Guess the number!");

    println!("Please input your guess.");

    let mut guess = String::new();

    io::stdin().read_line(&mut guess)
        .expect("Failed to read line");

    println!("You guessed: {}", guess);
    // bindings
    let (x, y) = (1, 2);
    // mutability
    let mut z = 5;
    z = 10;

     {
        let y: i32 = 3;
        println!("The value of x is {} and value of y is {}", x, y);
     }
    // functions
    fn print_sum(x, y) {
        println!("sum is: {}", x + y);
    }
    // loops
    while !done {
        x += x - 3;

        println!("{}", x);

        if x % 5 == 0 {
            done = true;
        }
    }
    // borrowing
    fn foo(v1: &Vec<i32>, v2: &Vec<i32>) -> i32 {
        // do stuff with v1 and v2

        // return the answer
        42
    }

    let v1 = vec![1, 2, 3];
    let v2 = vec![1, 2, 3];
    let answer = foo(&v1, &v2);
    // node interop
    fn fibonacci(x: i32) -> i32 {
        if x <= 2 {
            return 1;
        } else {
            return fibonacci(x - 1) + fibonacci(x - 2);
        }
    }
}