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How to do simple arithmatic in PROLOG

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well you can either use any way to get simple arithmatics in prolog.

For example typing X is 3+2.
gives X=5.
in prolog .

Similarly you can write R is 5*2.
it will give R= 10.

so doing simple arithmatics is very simple.

please note that X or R is capital it can not be a lowercase character otherwise prolog will give output as true.
or use this knowledge base
.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!copy from below!!!!!!!!!!!!!!!!!!!!!!!!!!!!

sum:-
    write_ln('Enter the first number:-'),
    read(First),
    write_ln('Enter second number:-'),
    read(Second),
    S is First+Second,
     write('sum of '),write(First),write('and '),write(Second),write('is ='),write(S).

sub:-
    write_ln('Enter the first number:-'),
    read(First),
    write_ln('Enter second number:-'),
    read(Second),
    S is First-Second,
     write(' difference  of '),write(First),write(' and '),write(Second),write(' is ='),write(S).

multiply:-
    write_ln('Enter the first number:-'),
    read(First),
    write_ln('Enter second number:-'),
    read(Second),
    S is First*Second,
     write('Multiplication of '),write(First),write(' and '),write(Second),write(' is ='),write(S).

divison:-
    write_ln('Enter the first number:-'),
    read(First),
    write_ln('Enter second number:-'),
    read(Second),
    S is First/Second,
     write('Divison '),write(First),write(' / '),write(Second),write(' is ='),write(S).





!!!!!!!!!!!!!!!!!!!!!!!!!!code end!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

SAMPLE SHOT:


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