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Excel ISNA Function

Author: Sun Last Modified: 2024-10-08
showing the usage of ISNA function

If you want to follow along with this tutorial, please download the example spreadsheet.

showing the usage of ISNA function

Description

The Excel ISNA function tests if a value or expression returns Excel #N/A error. If so, it returns TRUE, otherwise, returns FALSE.

Syntax and arguments

Formula syntax

ISNA(value)

Arguments

  • Value: Required, the value that used to be tested. It can be a formula, a cell reference, a name, or other expressions.

Return Value

The ISNA function returns a logical value TRUE or FALSE.

Version

Excel 2003 and later versions

Usage and Examples

Example1: Basic Usage

To check if the cells in range B4:B8 contain #N/A error, you can use the ISFORMULA function as below:

Select a cell to place the checking result, and type the formula as this:

=ISNA(B4)

Press Enter key, and then drag the auto-fill handle down to get all results.
showing the usage of ISNA function

Example2: Combine with IF function

The ISNA function is usually combined with the IF function to return a custom message when the cell contains a #N/A error.:

Supposing in range B12:B16 contains name list 1, then using the VLOOKUP function to find if the names in D12:D15 are in the name list 1, the names do not exist in name list 1 will return #N/A errors. Then change the #N/A error to a custom message such as None. You can use the ISNA function as this:

=IF(ISNA(E12),"None",E12)

Press Enter key, and then drag the auto-fill handle down to get all results.
showing the usage of ISNA function


Relative Functions:

  • Excel ISODD Function
    The ISODD function checks whether a value is an odd number. If the given value is an odd number, it returns TRUE. Otherwise, it returns FALSE.

  • Excel ISEER Function
    The ISERR function returns TRUE for any error type (except #N/A) and FALSE otherwise.

  • Excel ISEVEN Function
    The Excel ISEVEN function tests if a supplied number (or numeric expression) is even, if so, it returns TRUE, otherwise, it returns FALSE.

  • Excel ISREF Function
    The ISREF function checks whether a given value is a reference. If the given value is a reference, it returns TRUE. Otherwise, it returns FALSE.


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