# NA function: Description, Usage, Syntax, Examples and Explanation

## What is NA function in Excel?

NA function is one of the Information functions in Microsoft Excel that returns the error value #N/A. #N/A is the error value that means “no value is available.” Use NA to mark empty cells. By entering #N/A in cells where you are missing information, you can avoid the problem of unintentionally including empty cells in your calculations. (When a formula refers to a cell containing #N/A, the formula returns the #N/A error value.)

## Syntax of NA function

NA( )

The NA function syntax has no arguments.

## NA formula explanation

- You must include the empty parentheses with the function name. Otherwise, Microsoft Excel will not recognize it as a function.
- You can also type the value #N/A directly into a cell. The NA function is provided for compatibility with other spreadsheet programs.