ISNA


Tests for the #N/A (Not Available) error value.

Syntax:

ISNA(value)
Returns TRUE if value is or refers to the #N/A (Not Available) error and FALSE otherwise.

Example:

ISNA(NA())
returns TRUE, because NA() returns the #N/A error.
ISNA(1/0)
returns FALSE, because 1/0 is a #DIV/0! error, not a #N/A error.
ISNA(A1)
where A1 contains "dog", returns FALSE, because "dog" is text, not an error.






 
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