A to Z of Excel Functions: the ISTEXT Function
16 August 2021
Welcome back to our regular A to Z of Excel Functions blog. Today we look at the ISTEXT function.
The ISTEXT function
At the time of writing, there are 12 IS functions, i.e. functions that give rise to a TRUE or FALSE value depending upon whether a certain condition is met:

ISBLANK(reference): checks whether the reference is to an empty cell

ISERR(value): checks whether the value is an error (e.g. #REF!, #DIV/0!, #NULL!). This check specifically excludes #N/A

ISERROR(value): checks whether the value is an error (e.g. #REF!, #DIV/0!, #NULL!). This is probably the most commonly used of these functions in financial modelling

ISEVEN(number): checks to see if the number is even

ISFORMULA(reference): checks to see whether the reference is to a cell containing a formula

ISLOGICAL(value): checks to see whether the value is a logical (TRUE or FALSE) value

ISNA(value): checks to see whether the value is #N/A. This gives us the rather crude identity ISERR + ISNA = ISERROR

ISNONTEXT(value): checks whether the value is not text (N.B. blank cells are not text)

ISNUMBER(value): checks whether the value is a number

ISODD(number): checks to see if the number is odd. Personally, I find the number 46 very odd, but Excel doesn’t

ISREF(value): checks whether the value is a reference

ISTEXT(value): checks whether the value is text.
As stated above, the ISTEXT function checks to see whether the value is text. It has the following syntax:
ISTEXT(value)
The ISTEXT function has the following argument:
 value: this is required and represents the value for which you wish to determine whether it contains text.
It should be further noted that:
 if ISTEXT is FALSE, this does not mean ISNONTEXT is TRUE. For example, #DIV/0! Is neither text nor nontext; it is an error
 if value is not a valid data type, such as a defined name that is not a reference, ISTEXT returns the #VALUE! error value.
Please see my example below:
We’ll continue our A to Z of Excel Functions soon. Keep checking back – there’s a new blog post every business day.
A full page of the function articles can be found here.