What is the use of ISNA function?

ISNA Function in Excel returns TRUE if the given value is #NA, otherwise returns FALSE

What is the syntax of ISNA function?

ISNA Function in Excel - Syntax

ISNA( value)

value : value to be checked

ISNA Function in Excel – Examples

ISNA Function in Excel - Example 1

Example 1: Returns FALSE as the given value is not #NA
Example 2: Returns FALSE as the given value is not #NA
Example 3: Returns FALSE as the given value is not #NA
Example 4: Returns TRUE as the given value is #NA

Reference:

Please refer the below article for more Information Excel functions.
Information Excel Formulas

Please refer the below article for more Excel Functions.
Excel Formulas | Home