The output requested by variable Output is written
to the directory OutputIterDir
when the iteration number is a multiple of the OutputInterval variable.
Subdirectories are named Y.X, where Y is td, scf, or unocc, and
X is the iteration number. To use the working directory, specify "."
(Output of restart files is instead controlled by RestartWriteInterval.)
Must be >= 0. If it is 0, then no output is written. For gs and unocc
calculations, OutputDuringSCF must be set too for this output to be produced.
This variable can also be defined inside the Output block.
See Output.