November 2025
Intermediate to advanced
207 pages
6h 14m
English
Content preview from Excel at 40
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- LET: Defining & Reusing Variables in a Formula
Frequently, I am asked to solve a problem that requires a tricky formula. I often start by building the solution in multiple columns, solving one piece of the problem at a time. After I have the multiple sub-formulas working, I put it all back into one monster formula. Often during this process, I find that one or more subformulas are used repeatedly in later subformulas.
Imagine if the formula in D2 is referenced in E2, F2, and G2. When you are combining the formulas into one, you end up pasting the D2 formula into the monster formula three times.
This is exactly the kind of problem that is helped by the LET function.
Say that you have a long column of names that are badly formatted. There are ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.