>> 0
>> 1
>> 2
>> 3
>> 4
>> 5
>> 6
>> 7
>> 8
>> 9
[0]: 0
[1]: 2
[2]: 4
[3]: 6
[4]: 8
[5]: 10
[6]: 12
[7]: 14
[8]: 16
[9]: 18