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# fibonacci
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## Intructions
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Écrire une fonction **récursive** qui renvoie la valeur de la suite de fibonacci correspondant à l'index passé en paramètre.
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La premiére valeur est à l'index `0`.
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La suite débute ainsi: 0, 1, 1, 2, 3 etc...
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Un index négatif renvoie `-1`.
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`for` est **interdit** pour cet exercice.
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## Fonction attendue
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```go
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package main
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func Fibonacci(int index) int {
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}
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```
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## Utilisation
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Voici un éventuel `main.go` :
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```go
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package main
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import (
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"fmt"
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piscine ".."
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)
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func main() {
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arg1 := 4
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fmt.Println(piscine.Fibonacci(arg1))
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}
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```
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Et son résultat :
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```console
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student@ubuntu:~/piscine/test$go build
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student@ubuntu:~/piscine/test$ ./test
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3
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student@ubuntu:~/piscine/test$
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```
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