Does a description exist in a book or website of valid countif criteria?
For example - =COUNTIF(A$7:A$15,2) works

=COUNTIF(A$7:A$15,"=2") also works, but
=COUNTIF(A$7:A$15,"=1+1") does not work


I don't need an answer to a specific example, just a place to go and read on
my own.

Thanks in advance for any help received.
--
jake