Please help in understanding this piece of code

[tinkalgo]

you are building an array out of a list which is created using a list comprehension.
this specific list comprehension picks each number in [2, 4, 6], one at a time and using the range function. the range(lower_bound, upper_bound) function itself returns a list containing all numbers from lower_bound to upper_bound - 1. So your list will contain 3 sublists. for the first one range will be called with 2, since it is the first one in [2, 4, 6]. So range(2, 5) == [2, 3, 4]. The second list is made from i = 4, so that range(4, 7) will return [4, 5, 6]. And finally using i = 6 will result in range(6, 9) == [6, 7, 8]. so that your complete list will look like this: [[2, 3, 4], [4, 5, 6], [6, 7, 8]]. And out of that you are creating an array :)

Thanks you very much, You explained the concept in an excellent way.