Prolog Beginner's Tutorial: 'Compiling' Your First Prolog Program using GNU Prolog

Let's write your first prolog program. We'll use GNU Prolog to get it done!

In this video, I walk you through a brief tutorial just to get you started. I'm going to show you how to

2. Create your first "program".
3. Create your first fact.
4. Create your first rule.
5. Create your first query.
6. Comments: line and block.

You can download the version of Prolog used in this video here:

If you have any comments, see anything crazy, notice any mistakes, etc, please feel free to mention it in the comments below.

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[peterkosmas]

fixed it, EXCELLENT, MANY THANKS, it was my worst lesson when i was at the university, now after 18 years with my mind more clear i start to understand it . :)

[meganpaffrath]

On a mac, using homebrew you can simply do: `brew install gnu-prolog`, then to use in terminal: `gprolog`

[cyrusdavidpastelero]

Thank you, sir! Great tutorial for newcomers.

[rosaniarose]

great(Name):-
write('Hi Prof', Name), tab(2), write('thank you for tutorial'),
write(Name).

[peterkosmas]

i use the uppercase example but i allways get no . Is there some kind of setting for this to set the variable ?

[dorrislintao]

how to clear screen? I tried the suggestions below but nothing happens.

[tanjimsm]

loops...Loops ... LOOOP, is there a way to irritate though and print numbers in decreasing order ?
tanks.

[voicihojun]

the first part of this video, after changing directory, i wrote down just as you with the file. "[demo]." But it didn't work with this error message. "uncaught exception: error(system_error('error trying to execute pl2wam (maybe not found)'), consult/1)". I already searched the resolution for it. there is no answer with it. do you know how to handle this error?

[negarmaleki]

Hi,
I recently installed GNU Prolog on my Mac. I wonder, is there any console for this programming language on Mac? I really need to work with it, so please help me if you know how I should do that.

[ahsanalikhan]

Sir I need help can you do Davis putnam SAT procedure in prolog. Please