maximum(?SetVariable, ?Max)

SetVariable

A Set (variable or ground) of integers.

Max

An integer or an FD variable.

Description

If Max is given (as an integer or FD variable) then SetVariable is constrained to have such maximum. If Max is a free variable, then it is unified with the set's maximum as an FD variable or an integer (if it is already known).

maximum/2 can thus be used either to declare (or constrain) a maximum function or to retrieve it.

Fail Conditions

Resatisfiable

Examples

?- S`::[]..[1,2], maximum(S,M).
?- set(S,[],[1,2],[maximum:2], maximum(S,M).
M = 2

?- S`::[]+[1,2], maximum(S,1).
S = [1]

?- set(S,[],[1,2],[maximum:1], maximum(S,M).
S = [1]
M = 1

See Also