A parameter is an entity that represents a value supplied by one function that desires to render the services of another function. It is sometimes referred to as an argument or "arg" rather than a parameter. Parameters can be a value, a constant or a variable but in any case they are values that facilitate the evaluation of a function, procedure or subroutine. Constant parameters, or actual parameters, cannot be altered by the function whereas variable parameters, or formal parameters, represent values that can be changed within the function or procedure. All the parameters used in a function or procedure must be listed in the header of that function or procedure or the function must include a directive to where the parameters are listed, as is the case when using global parameters. There are certain functions that can be designed to operate well without the need of parameters...