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....special syntaxes for defining arrow functions and methods , which...funcName(x, y) { return x * y; }; // Arrow function const multiply = (x...