Strange behaviour setting pinMode by array

[chrisknightley]

@serious_sam

i <= 9;

@Grumpy_Mike

i < 10;

It looks to me the same execution result.

@serious_sam

int PINS[] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11};

Also, pin 10 is not the end of the array.