So to Write A prolog programming . First Fire up your SWI -PROLOG software. then you will see something like this . Welcome to SWI-Prolog (threaded, 64 bits, version 7.4.2) SWI-Prolog comes with ABSOLUTELY NO WARRANTY. This is free software. Please run ?- license. for legal details. For online help and background, visit http://www.swi-prolog.org For built-in help, use ?- help(Topic). or ?- apropos(Word). ?- _ 1. So now go to File>NEW.... and give any name to knowledge base file. I Give it factorial .pl 2. now write the follwing fact and rules . fact(0,1) . fact(N,R):- N>0, N1 is N-1, fact(N1,R1), R is N*R1. now press ctrl +s to save . 3. now close this windows . 4. now in the main window goto file > Consult..... and select your factorial.pl 5. now you can type query like fact(5,X). it will return X=120. done..... here are some screen shot :...
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