Enter this in C1
=IF(COUNTIF($A$1:$A$100,B1)0,"Present in Col A","Not found in Col A")
and copy down as far as you have entries in Col B after changing 100 to the
last row of data in Col A

You can use, in D1 to look in Col B for values in Col A
=IF(COUNTIF($B$1:$B$100,A1)0,"Present in Col B","Not found in Col B")
"monkeytrader" wrote:

Thanks for your help in advance.

If i have values in column A, and values in column B, is there a quick and
easy formula that will isolate the duplicates--the values that are
identical--in the two columns? It's basically comparing 2 lists, names for
example, and trying to cross reference them.

Thanks again. I hope someone can help.