This function returns the error value #N/A that means "not available."
NA( )
This function does not require an argument.
It is necessary to include empty parentheses with this function.
Returns an error value.
NA()
NA(R12C7)
ISNA(NA())gives the result TRUE
This function is available in product version 1.0 or later.
ISNA | ISNUMBER | Information Functions