// Adding new item to array, its size is incremented
   AAdd( arr1, { "LBASE", "L", 1, 0 } )
// Delete the first item of arr3, The size of arr3 remains the same, all items are shifted to one position, the last item is replaced by Nil:
   ADel( arr1, 1 )
// Assigning a value to array item
   arr3[ 1, 1, 1 ] := 11.4