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## nruneprog
### 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$
```