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# HOW TO: Use SUM Function on Only Odd or Even Rows in Excel 2000

For a Microsoft Excel 97 and earlier version of this article, see 136738.

##### SUMMARY
This step-by-step article explains how to use the SUM function on only the odd rows or the even rows in a range.

When you use any of the worksheet functions in Excel, and youhave a range argument that includes either hidden rows or columns, thecells in these hidden areas are still used by the function. For example,if you have the following data in a worksheet
`   A1: 1   A2: 1   A3: 1   A4: =SUM(A1:A3)				`
the SUM function in cell A4 returns a value of 3. If you then hide Row 2,the SUM function still returns a value of 3.

If you want to use the SUM function on only the odd rows or the even rows in a range, you can use the following formulas.

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### Odd Rows

Enter the following formula as an array formula in cell A4:
`   =SUM(IF(MOD(ROW(A1:A3),2)=1,A1:A3,0))				`
The formula returns a value of 2.

NOTE: To enter a formula as an array formula in Excel, press CTRL+SHIFT+ENTER.

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### Even Rows

Enter the following formula as an array formula in cell A4:
`   =SUM(IF(MOD(ROW(A1:A3),2)=0,A1:A3,0))				`
The formula returns a value of 1.

NOTE: If you want to hide rows for the above example, the twofunctions shown in this article still work as outlined.

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Article ID: 213961 - Last Review: 01/06/2006 02:52:00 - Revision: 3.1

• Microsoft Excel 2000 Standard Edition
• kbhowtomaster KB213961