# ISNA

## Content

This function, Is Not Available, tests whether a value, an expression or contents of a referenced cell has the not available (#N/A) error value.

## Syntax

`ISNA(cellreference)`
`ISNA(value)`
`ISNA(expression)`

## Arguments

[Required] Specify a cell reference, a numeric or text value, or an expression for the argument.

## Remarks

Use this function to test the contents of a cell, a numeric or text value directly, or a function or expression.
This function returns TRUE if the value is or refers to the Not Available error value, and returns FALSE if the value is or refers to a cell with no data.

## Examples

`ISNA(B12)`
`ISNA(R12C2)`
`ISNA(#N/A)` gives the result TRUE
`ISNA(NA())` gives the result TRUE
`ISNA(#REF!)` gives the result FALSE