what describes a functions purpose
By using functions, you can quickly and easily make many useful calculations, such as finding an average, the highest number, the lowest number, and a count of the number of items in a list. Microsoft Excel has many functions that you can use. To use functions, you need to understand reference operators. Reference operators refer to a cell or a group of cells. There are two types of reference operators: range and union. A range reference refers to all the cells between and including the reference.