The comprehensive reference for Excel functions Learn Excel This reference includes an explanation of all the functions in Excel, including the functions that are not included, as there are functions that are not included in the search for functions list in recent versions. They have been explained. If we write one of these functions, Excel will call this function. The book also displays the alternative functions of the functions. It also presents some ideas and applications on the use of each text function, search functions, data extraction, mathematical functions, financial and statistical functions, and other functions.