How to know if Emacs is running in batch mode

Question

I have one file that needs to behave differently depending on whether Emacs is running in batch mode (non interactive) or normal mode.

(if batch-mode-t 
    a-func
  b-func)

How can I detect this?

Answer 1

You can look at the variable noninteractive, for example:

(if noninteractive
    a
  b)