The text read off it
[02.04.07.01]
In general, positional indicators are evaluated when their subscripts change value. Execution of the code generated for SET K=K+2 would cause the positional indicators for 3 of the subscripted names shown above to be updated:
A(J, K), A(2, K), and A(J, K+1)
The initial value of an array is A(1) and not A(0).