How can I avoid duplications entering data in Excel?

[JCHSAlgebraTeacher]

I am entering names of students that I have had over the past 30 years from
rosters I have kept onto Excel. While I am entering the names (in 2 columns)
how can I have the computer notify me that I have entered a name already
entered since I do have some students more than once?

Version 2003

[Mark]

On Dec 27, 10:34 am, JCHSAlgebraTeacher

if you have no blank entries in your name columns, except for the ones
at the bottom of course, you may be able to use Excel's
Data...Filter...Auto Filter Option. It will give you the ability to
see if you have any duplicates very easily.

[Roger Govier]

Hi

One way
In cell C1 enter the following formula
=IF(A1="","",COUNTIF($A$1:A1,A1))
and copy down as far as required
You will see a Count of the number of entries with that name in column C

--
Regards
Roger Govier

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