STANDARD-CO.html -- ACL2 Version 6.3

### STANDARD-CO

the character output channel to which `ld` prints

    Major Section:  ACL2-BUILT-INS

`Standard-co` is an `ld` special (see ld). The accessor is `(standard-co state)` and the updater is `(set-standard-co val state)`. `Standard-co` must be an open character output channel. It is to this channel that `ld` prints the prompt, the form to be evaluated, and the results. The event commands such as `defun`, `defthm`, etc., which print extensive commentary do not print to `standard-co` but rather to a different channel, `proofs-co`, so that you may redirect this commentary while still interacting via `standard-co`. See proofs-co.

``Standard-co'' stands for ``standard character output.'' The initial value of `standard-co` is the same as the value of `*standard-co*` (see *standard-co*).