**You**: show me rust code

**Bard**: Sure, here is a simple Rust program that prints "Hello, world!" to the console:

```rust
fn main() {
  println!("Hello, world!");
}
```

This program uses the `fn` keyword to define a function called `main()`. The `main()` function is the entry point for all Rust programs. The `println!()` macro prints the string "Hello, world!" to the console.

Here is another example of a Rust program that calculates the factorial of a number:

```rust
fn factorial(n: u32) -> u32 {
  if n == 0 {
    return 1;
  } else {
    return n * factorial(n - 1);
  }
}

fn main() {
  let n = 5;
  println!("{}", factorial(n));
}
```

This program uses the `fn` keyword to define a function called `factorial()`. The `factorial()` function takes a number as input and returns the factorial of that number. The `main()` function calls the `factorial()` function with the number 5 as input and prints the result to the console.

These are just a few examples of Rust code. There are many more examples available online, and the Rust documentation is a great resource for learning more about the language.

**You**: show me rust code

**Bard**: Sure, here is a simple Rust program that prints "Hello, world!" to the console:

```rust
fn main() {
  println!("Hello, world!");
}
```

This program uses the `println!()` macro to print the string "Hello, world!" to the console. The `println!()` macro takes a format string as its first argument, and any additional arguments are used to fill in the format placeholders in the string. In this case, the format string is simply "Hello, world!", so there are no additional arguments.

To compile and run this program, you can use the following commands:

```
rustc hello.rs
./hello
```

The first command will compile the program into an executable file called `hello`. The second command will run the executable file, printing "Hello, world!" to the console.

Here is another example of a Rust program that calculates the factorial of a number:

```rust
fn factorial(n: u32) -> u32 {
  if n == 0 {
    return 1;
  } else {
    return n * factorial(n - 1);
  }
}

fn main() {
  let n = 5;
  let factorial_of_n = factorial(n);
  println!("The factorial of {} is {}", n, factorial_of_n);
}
```

This program uses the `if` statement to check if the number is equal to 0. If it is, the function returns 1. Otherwise, the function recursively calls itself, passing in the number minus 1. The function then multiplies the result of the recursive call by the number, and returns the product.

To compile and run this program, you can use the following commands:

```
rustc factorial.rs
./factorial
```

These are just a few examples of Rust code. There are many other things you can do with Rust, such as writing web servers, games, and operating systems. If you're interested in learning more about Rust, I recommend checking out the official Rust documentation.

**You**: show me rust code