Arithmetic/Integer: Difference between revisions

=={{header|Prolog}}==

Integer quotient (`//`) rounds towards 0.

Remainder (`rem`) matches the sign of its first operand.

<lang prolog>

print_expression_and_result(M, N, Operator) :-

Expression =.. [Operator, M, N],

Result is Expression,

format('~w ~8|is ~d~n', [Expression, Result]).

arithmetic_integer :-

read(M),

read(N),

maplist( print_expression_and_result(M, N), [+,-,*,//,rem,^] ).

</lang>

Use thus:

<lang prolog>

?- arithmetic_integer.

|: 5.

|: 7.

5+7 is 12

5-7 is -2

5*7 is 35

5//7 is 0

5 rem 7 is 5

5^7 is 78125

true.

</lang>