Arity is the number of arguments that something takes: something could be a function, an operation or something in a computer language such as a subroutine or a method.
The word operand might be used instead of argument.
Addition and Multiplication are Binary Operations.
Below, Signflip is a Unary Operation.
Signflip(x) = -x
Look at the computer code below.
- TriAddition(a,b,c)
- {
- d=a+b+c
- return d
- }
When we call the method TriAddition we provide it with three values. It adds these up and returns the results of the calculation–one value.
Rob Sterling 