What exactly is a mathematical operation? Wiki states that an operation in math is "a calculation from zero or more input values (called "operands") to an output value." That sounds oddly like a function, but I'm assuming that not all operations are functions? What is the relationship between functions and operations? I notice that, according to the article again, operations share several properties with functions, such as having domains. It looks like a function is just a special type of operation? Thanks all.