1. Prolog Quick Start
1.1. Prolog code statements end with . a period
Or Run program with-in the prolog REPL:
$ swipl
?- write("hello, world").
?- halt.1.2. Proglog statements are joined together with , a comma
Or Run program with-in the prolog REPL:
$ swipl
?- write("hello, world"), write(" and that's a wrap.").
?- halt.1.3. A prolog program file ends with a .pl
Make a prolog program file:
$ mkdir prolog_hello
$ cat << EOF > prolog_hello/hello.pl
write("hello, world").
EOF1.4. Run a prolog program
-
From the command line
$ swipl -s prolog_hello/hello.pl-
from with-in the prolog REPL:
$ swipl
?- [prolog_hello/hello]
?- halt.