=COUNTIF(Range,"<>") and =COUNTA(Range)-COUNTBLANK(Range) don't return
the same value.
=COUNTIF(Range,"<>") and =SUMPRODUCT(1-ISBLANK(Range)) each exclude only
truly blank cells.
=COUNTA(Range)-COUNTBLANK(Range) double-excludes the truly blank cells.
Otherwise, the information's great.
Instead of =COUNTA(Range)-COUNTBLANK(Range) one could use
=COUNTA(Range)+COUNTIF(Range,"=")-COUNTBLANK(Range) or
=(ROWS(Range)*(COLUMNS(Range))-COUNTBLANK(Range))
Alan Beban