Generally, the complexity of a function is a measure of both using and understanding the functions. Some functions require many arguments or take optional arguments that can signficantly effect how
the calculation that a function performs. With more required and optional arguments, a function tends to be more difficult to enter properly. For example, the **AMORDEGRC** function.

These complexity ratings are solely the subjective opinion of the authors and are intended to be a general guide for you. Depending on what you use Excel for, you may find even the most
obscure functions highly useful to you.