Show help for What. What is a term that describes the topics(s) to
give help for. Notations for What are:
- Atom
- This ambiguous form is most commonly used and shows all
matching documents. For example:
?- help(append).
- Name / Arity
- Give help on predicates with matching Name/Arity. Arity may
be unbound.
- Name // Arity
- Give help on the matching DCG rule (non-terminal)
- f(Name/Arity)
- Give help on the matching Prolog arithmetic functions.
- c(Name)
- Give help on the matching C interface function
- section(Label)
- Show the section from the manual with matching Label.
If an exact match fails this predicates attempts fuzzy matching and,
when successful, display the results headed by a warning that the
matches are based on fuzzy matching.
If possible, the results are sent through a pager such as the
less program. This behaviour is controlled by the Prolog flag
help_pager. See section level documentation.
- See also
- - apropos/1 for searching the manual names and summaries.