arraybase 0 or 1
array base 0 or 1

By default an integer from 0 to one less than the length of an array is used to index values within an array. This behavior can be modified with the arraybase statement. You may specify either a zero (for default indexing) or 1 for indexing starting at 1 and going to the length of the array.

arraybase 1
ar = {44,55,66,77,88}
for i = 1 to ar[?]
    ? i, ar[i]
next i

1            44
2            55
3            66
4            77
5            88