Parameters are the most complex part of a function, they specify the objects, order, or structure of the function's operation. This allows users to process a specific cell or range, such as analyzing deposit interest, determining grade rankings, calculating trigonometric function values, and more.

Based on their source, Excel functions can be classified into two categories: built-in functions and add-in functions. The former can be used by users as soon as Excel is started, while the latter must be loaded by clicking on the "Tools -> Load Add-ins" menu command before they can be used like built-in functions.

What is a formula?

Functions and formulas are both different and related to each other. If the former is a special formula predefined by Excel, the latter is a calculation expression designed by users to compute and process worksheets.

Using the formula "=SUM(E1:H1)*A1+26" as an example, it starts with an equal sign "=", and can include functions, references, operators, and constants. In the above formula, "SUM(E1:H1)" is a function, "A1" is a reference to cell A1 (using the data stored within it), "26" is a constant, "*" and "+" are arithmetic operators (along with comparison, text, and reference operators).

If a function is to appear in the form of a formula, it must have two components: an equal sign before the function name and the function itself.