The array issue.

I'm trying to focus myself on the array issue. Why? Because it's important how I'm allocating memory. If a programmer will like to create an Array in LB+:
DIM A(20,20+1)
and then declare one specific item of that array"
Let A(1,1) = LN(17)
I have to be sure that at the address of that item the value of LN(17) is written,so later when:
something like:
PRINT A(1,1)
occurs: to read that right from the memory.