Not sure whether this is what you are looking for€¦

If the First Character of B1 < M
=IF(TRIM(LEFT(B1,1))<"M",A1,"")

Or

If you want to look B1 cell whether its having the character M in any case
(Upper or Lower)
=IF(ISNUMBER(SEARCH("M",B1))=FALSE,A1,"")

Or

If you want to look B1 cell whether its having the character M only in upper
case.
=IF(ISNUMBER(FIND("M",B1))=FALSE,A1,"")

Remember to Click Yes, if this post helps!

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(Ms-Exl-Learner)
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"Lost Cluster" wrote:

Im using the If Function to compare a string of text to a letter. This is
what I have

ColA has names ColB has the days off in this format (string of text)
Su/M/Tu-Th ColC-J have the days of the week Monday-Sunday. I want the names
of Col A to appear in Col C-J if they work those days. So the If Function
that Im using is: =IF(B1<"M",A1,"")
But its not working. Im trying to say that if ColB does not equal M
(Monday) then put the name from ColA under Monday.
Thanks