Problem Statement

Get two integers from the user, then create a two-dimensional array where the two dimensions have the sizes given by those numbers, and which can be accessed in the most natural way possible. Write some element of that array, and then output that element. Finally destroy the array if not done by the language itself.

Let's start with the solution:

array←m n ⍴ 0 ⍝ array of zeros with shape of m by n.

array[1;1]←73 ⍝ assign a value to location 1;1.

array[1;1] ⍝ read the value back out

⎕ex 'array' ⍝ erase the array