Syntax: =COUNTIF(range,criterion)
range - The range which is tested against criterion.
criterion - The pattern or test to apply to a range
=COUNTIFS(criteria_range1, criterion1, [criteria_range2, criterion2, ...])
criteria_range1 - and criterion1 - first set of range and criterion
criteria_range2 and criterion2, - second set of range and criterion
The Countblank function returns the number of the black cells across given range =COUNTBLANK(range).
range - The range where you want to find blank cells.