// 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