Microsoft Office

Part II
Working with Formulas and Functions
This formula creates a new array that consists only of the nonzero values in the range. The AVERAGE function
then uses this new array as its argument.
You also can get the same result with a regular (non-array) formula:
=SUM(B5:B12)/COUNTIF(B5:B12,”0”)
This formula uses the COUNTIF function to count the number of nonzero values in the range. This value is
divided into the sum of the values.
Determining whether a particular value appears in a range
To determine whether a particular value appears in a range of cells, you can choose Edit ➪ Find and do a
search of the worksheet. But you also can make this determination by using an array formula.
Figure 18.3 shows a worksheet with a list of names in A5:E24 (named NameList). An array formula in cell
D3 checks the name entered into cell C3 (named TheName). If the name exists in the list of names, the formula
displays the text Found. Otherwise, it displays Not Found.
FIGURE 18.3
Using an array formula to determine whether a range contains a particular value.
The array formula in cell D3 is
{=IF(OR(TheName=NameList),”Found”,”Not Found”)}
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