The material in these pages provides a basic introduction to the programming language Prolog. It is highly recommended that you also consult one of the books listed in the further references.
The Prolog language is unlike the imperative languages that you are used to. In a real sense there is no such thing as a "Prolog program". Prolog works by querying a database of facts and rules. The language is thus declarative in nature. You tell the system how to recognize the answer and the system searches for the answer. This make prolog both easier and harder than other languages. Easier because there is trmendous evelrage obtained from the declarative approach, harder because some things that you are used to (mainly destructive assignment) are not supported at all.
This guide to the language is divided into four parts. But before you start you need to know how to access and use Prolog at SJU.
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Last Changed: 2 August 1995