logic variable

<programming>

A variable in a logic programming language which is initially undefined ("unbound") but may get bound to a value or another logic variable during unification of the containing clause with the current goal. The value to which it is bound may contain other variables which may themselves be bound or unbound.

For example, when unifying the clause

	sad(X) :- computer(X, ibmpc).

with the goal

	sad(billgates).

the variable X will become bound to the atom "billgates" yielding the new subgoal "computer(billgates, ibmpc)".

Last updated: 1995-03-14

Nearby terms:

logic programmingLogic Replacement Technologylogic variableLOGINlog in

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