Reading in Programs


KEY

consult(F)  Instructs the interpreter to read-in the program which is  in  file
            F.    When  a directive is read it is immediately executed.  When a
            clause is read it is put after any  clauses  already  read  by  the
            interpreter for that procedure.

reconsult(F)
            Like consult except that any procedure defined in the "reconsulted"
            file  erases  any clauses for that procedure already present in the
            interpreter.  reconsult  makes  it  possible  to  amend  a  program
            without  having  to  restart from scratch and consult all the files
            which make up the program.

[File|Files]
            This is a shorthand way of consulting or  reconsulting  a  list  of
            files.   A file name may optionally be preceded by the operator '-'
            to indicate that the  file  should  be  "reconsulted"  rather  than
            "consulted". Thus

                | ?- [file1,-file2,file3].

            is merely a shorthand for

                | ?- consult(file1), reconsult(file2), consult(file3).