directive

else/0

Description

else

Starts an else branch when performing conditional compilation. The code following this directive is compiled iff the goal in the matching if/1 or elif/1 directive is false.

Template and modes

else

Examples

An example where a hypothetical application would have some limitations that the user should be made aware of when running on a backend Prolog compiler with bounded arithmetic:

:- if(current_prolog_flag(bounded, true)).

    :- initialization(
        logtalk::print_message(warning,app,bounded_arithmetic)
    ).

:- else.

    :- initialization(
        logtalk::print_message(comment,app,unbounded_arithmetic)
    ).

:- endif.

See also

elif/1, endif/0, if/1