Hello Everyone!

I am trying to understand how to programme arrays in MQL4. Can you please let me know if my interpretations are correct?

the above declares a single dimension 52 element array of integers with default value 0.

the above declares declares a two dimensional array, one dynamic, and one of 7 element array of integers with default value 0.

Many thanks,

slightly wrong: the declaration number is the size. So the first array is of 51 elements, and the second is an indefinite number as a multiple of 6; "dynamic" as you say.

You access elements by a zero based index, which would be 0-50 for the first array, and 0-5 for the second dimension of the second array.

Hello Ralph!

Thank you very much for your reply!

So if my understanding is correct,

would result in:

0
.
.
.
50

and

would result in something like:
0 0
1 1
2 2
3 3
4 4
5 5


?

The first is right. The first element has index 0, second index 1, and so forth, with each n:th element having index n-1, up to the 51:st element.

The second is probably right thinking as well, assuming there is an invisible column heading of "0" for the first column and "1" for the second column. It's a fair enough interpretation to think of the first index as telling which column to look in, and the second index as telling which row (of that column).

Hello Ralph!

Thank you again for your time. It is very helpful!