Variadic

C's printf is one of the most widely used variadic functions.

There are some functions and predicates which we tend to think of as being able to take any number of parameters – of being of variable arity or variadic.

The variadic functions that increase the valence of the input relation through the addition of a circumstance to the set of its argument-roles can be represented by means of an operator (or rather, a family of operators) ‘Circ’.

However, the real max procedure of Scheme is a variadic procedure, which means that it accepts any positive number of arguments: ¶ (max 5 1 3 8 9 7 2 6 4) => 9

each variadic argument

PHP 5.6 introduced variadics that explicitly accept a variable number of parameters.