(n ) The number of arguments taken by a function Arity is also sometimes used in place of valence
{i} total number of items involved in a particular relationship; number of arguments taken by a particular function (Computer Programming); number of arguments taken by a predicate (Linguistics)
Number of arguments that a function has For example, + usually adds two numbers together The numbers are its arguments That is, + is a binary function and so has an arity of 2
The arity of a CycL predicate or function is the number of arguments it takes Unary predicates and functions take just 1 argument Binary predicates and functions take 2 arguments Ternary predicates and functions take 3 arguments Quaternary predicates and functions take 4 arguments Quintary predicates and functions take 5 arguments No CycL predicate or function currently takes more than 5 arguments