Generally speaking, a function is a "subprogram" that can be called by code external (or internal, in the case of recursion) to the function. Like the program itself, a function is composed of a sequence of statements called the function body. Values can be passed to a function as parameters, and the function will return a value....example: js function updateBrand(obj) { // Mutating the object is...visible outside the function obj.brand = "Toyota"; // Try to reassign...