Finding every nth number in an array set

[babe20042004]

How would I go about finding every nth number in an array set? For example if i had a set containing the numbers 1-100 int each cell, how would I go about finding every 3rd number in the set.

[boxfish]

Use a for loop, but instead of incrementing the counter variable by one each time, add three to it.
Hope this helps.

[whodgson]

Yes as boxfish says instead of for(i=0;i<sardi nes; i++) the increment i++ could be expressed as i+=3