Difference between COUNT, COUNTA, COUNTIF and COUNTBLANK in Ms-Excel.
COUNT is used to count cells containing numbers, dates, etc. any value stored as number excluding blanks.
COUNTA or Count All is used to count any cell value containing numbers, text, logical values, etc. any type of value excluding blanks.
COUNTBLANK count blank cells or cells with an empty string.
COUNTIF and COUNTIFS count cells matching a certain criteria.