Horner's rule for polynomial evaluation: Difference between revisions
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=={{header|Prolog}}== |
=={{header|Prolog}}== |
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Tested with SWI-Prolog. Works with other dialects. |
Tested with SWI-Prolog. Works with other dialects. |
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<lang Prolog> |
<lang Prolog>horner([], _X, 0). |
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horner([H|T], X, V) :- |
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horner(T, X, V1), |
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V is V1 * X + H. |
V is V1 * X + H. |
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</lang> |
</lang> |
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Output : |
Output : |
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<lang Prolog> ?- |
<lang Prolog> ?- horner([-19, 7, -4, 6], 3, V). |
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V = 128.</lang> |
V = 128.</lang> |
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