### 9 Answering prompts in CURSA applications

Clearly you will usually reply to a prompt from a CURSA application by entering a suitable value. However, as usual for Starlink applications, the following special replies may also be entered:

?
display one line of help information about the prompt, and then re-prompt,
!
a value is not available to answer the prompt. The application will take appropriate action; in CURSA it will usually abort,
!!
abort the application6.

Note that these special replies are not available in catcdsin (see Section 23) and catremote (see Section 25).

6Of course the application may also be aborted by typing ‘<Control-C>’. Typing ‘<Control-C>’ is less likely to tidy up properly any files which are open, though this is unlikely to be important in practice.