affichage du tableau numéroté :
Array
(
[0] => 12
[1] => 8
[2] => 7
[3] => 11
[4] => 5
[5] => 9
[6] => 6
[7] => 10
)
affichage du tableau suit aux ajouts :
Array
(
[0] => 12
[1] => 8
[2] => 7
[3] => 11
[4] => 5
[5] => 9
[6] => 6
[7] => 10
[8] => 13
[9] => 4
)
nouvelle taille du tableau :10
cumul des notes :85
moyenne des notes :8.5
4
5
6
7
8
9
10
11
12
13
dernier élément :13
premier élément : 4