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times(?Factor1, ?Factor2, ?Product)

Succeeds if Product is the result of multiplying integer arguments Factor1 and Factor2.
An integer or a variable.
An integer or a variable.
An integer or a variable.


Defines the arithmetic relation Factor1 * Factor2 = Product. If all arguments are instantiated times/3 succeeds if this relation holds. If one of the arguments is uninstantiated, it is bound to an integer such that the relation holds. Note that this is not always possible. If the system is in coroutining mode and more than one argument is uninstantiated, times/3 delays until at least two of the arguments are known.

Modes and Determinism

Fail Conditions

Fails if it is impossible to find an integer instantiation such that Factor1 * Factor2 = Product holds


(4) instantiation fault
more than one argument is uninstantiated (non-coroutining mode only)
(5) type error
an argument is neither an integer nor a variable


   times(2, 3, 6).
   times(2, 3, Z).                   % gives Z=6
   times(X, 3, 6).                   % gives X=2
   times(2, Y, 6).                   % gives Y=3

   times(3, 4, 5).
   times(3, X, 5).

   times(2.0, 3.0, 6.0).             (error 5)
   times(1 + 4, 2, 10).              (error 5)
   times(X, 1, Z).                   (error 4)

See Also

plus / 3