One of the best ways to leverage the power of Microsoft Excel is by learning how to use functions. Functions are basically a short-hand way of telling Excel to perform a task. For example, using SUM tells Excel to add all the numbers you give it. And functions aren't just about math. There are functions for manipulating text, working with dates, and more. So if you're ready to take your Excel knowledge to the next level, this is the book that will help you do that by teaching you how formulas and functions work in Excel as well as covering fifty of the most useful functions in detail.