Information Functions

Function	Description
CELL	Returns information about the formatting, the position, and the content of a cell
ERROR.TYPE	Returns a number corresponding to an error type
INFO	Returns information about the current operating system environment
ISBLANK	Returns `TRUE` if the value refers to an empty cell
ISERR	Returns `TRUE` if the value is an error value (with the exception of `#NV`)
ISERROR	Returns `TRUE` if the value is an error value
ISEVEN	Returns `TRUE` if the number is even
ISLOGICAL	Returns `TRUE` if the value is a logical value
ISNA	Returns `TRUE` if the value is the error value `#NV`
ISNONTEXT	Returns `TRUE` if the value isn’t text
ISNUMBER	Returns `TRUE` if the value is a number
ISODD	Returns `TRUE` if the number is odd
ISREF	Returns `TRUE` if the value ...

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Microsoft® Excel® 2010 Formulas & Functions Inside Out by Helmut Reinke Egbert Jeschke Sara Unverhau, Eckehard Pfeifer, Bodo Fienitz, and Jens Bock