# 15. Exercise - COUNTBLANK Function

## Prerequisites

You should read the Excel Functions course up to the chapter on COUNTIF, COUNTIFS, SUMIF and SUMIFS functions before starting this exercise.

## Question

We take the example from Exercise 4 - Calculation, Formulas and Series and Exercise 2 – Logical functions.

We have filled in columns F to I using 4 formulas. In cell F5 :

=IF(B5="","",SUM($B5:B5))

In cell G5 :

=IF(OR(B5="",C5=""),"",SUM($B5:C5))

In cell H5 :

=IF(OR(B5="",C5="",D5=""),"",SUM($B5:D5))

In cell I5 :

=IF(OR(B5="",C5="",D5="",E5=""),"",SUM($B5:E5))

Now write a single formula in cell F5 to copy it to the range F5:I5 and then copy it to the last row of the sheet.

## Indications Exercise – COUNTBLANK Function

We use the COUNTBLANK function which returns the number of empty cells in a range of cells.

The formula in cell B5 is :

**=IF(COUNTBLANK($B5:B5)>0,"",SUM($B5:B5))**