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*(+Number1, +Number2, -Result)
Evaluates the product Number1 * Number2 and unifies the resulting value
with Result.
- Number1
- A number.
- Number2
- A number.
- Result
- Output: a number.
Description
This predicate is used by the ECLiPSe compiler to expand evaluable
arithmetic expressions. So the call to *(Number1, Number2, Result) is
equivalent to
Result is Number1 * Number2
which should be preferred for portability.
The result is of type breal if any of the arguments is a breal,
else float if any of the arguments is a float, else rational if any
of the arguments is a rational. Only when both arguments are
integers is the result an integer.
In coroutining mode, if Number1 or Number2 are uninstantiated, the call
to */3 is delayed until these variables are instantiated.
Modes and Determinism
Exceptions
- (4) instantiation fault
- Number1 or Number2 is not instantiated (non-coroutining mode only).
- (24) number expected
- Number1 or Number2 is not of a numeric type.
Examples
Result is 5*2. % gives Result = 10
Result is 5* -2.0. % gives Result = -10.0
See Also
is / 2