# ISNA

Spread for WinForms provides advanced software components that support Excel import/export, full cell customization, an extensive calculation engine with over 450 functions and more, all with zero dependencies on Excel.

## 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

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.

## Data Types

Accepts any data type for an argument. Returns Boolean (TRUE or FALSE) 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

## Version Available

This function is available in product version 1.0 or later.

## See Also

[ERRORTYPE](/spreadnet/docs/latest/online-formula/formulas-functionsall/formulas-functsDtoG/FunctionERRORTYPE) \| [ISERR](/spreadnet/docs/latest/online-formula/formulas-functionsall/formulas-functsFtoK/FunctionISERR) \| [ISERROR](/spreadnet/docs/latest/online-formula/formulas-functionsall/formulas-functsFtoK/FunctionISERROR) \| [NA](/spreadnet/docs/latest/online-formula/formulas-functionsall/formulas-functsMtoQ/FunctionNA) \| [Information Functions](/spreadnet/docs/latest/online-formula/formulas-overview/formulas-functs/formulas-functtypes/formulas-functsinfo)