## firstruneprog

> ### **WARNING! VERY IMPORTANT!**

> For this exercise a function will be tested **with the exam own main**. However the student **still needs** to submit a structured program

This means that:

- The package needs to be named `package main`.
- The submitted code needs one declared function main(```func main()```) even if empty.
- The function main declared needs to **also pass** the `Restrictions Checker`(illegal functions tester). It is advised for the student to just empty the function main after its own testings are done.
- Every other rules are obviously the same than for a `program`.

### Instructions

Write a function that returns the first `rune` of a `string`.

### Expected function

```go
func FirstRune(s string) rune {

}
```