## nrune

### Instructions

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

- In case of impossibilities, the function returns `0`.

### Expected function

```go
func NRune(s string, n int) rune {

}
```

### Usage

Here is a possible program to test your function :

```go
package main

import (
	"github.com/01-edu/z01"

	piscine ".."
)

func main() {
	z01.PrintRune(piscine.NRune("Hello!", 3))
	z01.PrintRune(piscine.NRune("Salut!", 2))
	z01.PrintRune(piscine.NRune("Bye!", -1))
	z01.PrintRune(piscine.NRune("Bye!", 5))
	z01.PrintRune(piscine.NRune("Ola!", 4))
	z01.PrintRune('\n')
}
```

And its output :

```console
student@ubuntu:~/[[ROOT]]/test$ go build
student@ubuntu:~/[[ROOT]]/test$ ./test
la!
student@ubuntu:~/[[ROOT]]/test$
```