public/subjects/lastrune/README.md

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## lastrune
### Instructions
Write a function that returns the last `rune` of a `string`.
### Expected function
```go
func LastRune(s string) 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.LastRune("Hello!"))
z01.PrintRune(piscine.LastRune("Salut!"))
z01.PrintRune(piscine.LastRune("Ola!"))
z01.PrintRune('\n')
}
```
And its output :
```console
$ go run .
!!!
$
```
### Notions
- [rune-literals](https://golang.org/ref/spec#Rune_literals)