ISERROR Excel Formula
In this tutorial, you will learn the use of the ISERROR excel formula. ISERROR function in excel is useful to evaluate whether data has an error value or not.
Why do We Need to Learn the ISERROR Function in Excel?
On doing some processing in the spreadsheet, especially if we often use formulas and calculations, sometimes we find errors in the data that we have. The error value can disrupt us because it can cause our processing to produce wrong or inaccurate results. For that, maybe we need to mark the error values that we get in the spreadsheet so we can identify them and implement the right solution.
Error values can be found in various processing cases in our job. For example, imagine we do processing in the spreadsheet to see the reasons why a company’s product cannot meet its sales target as expected. When we do processing in the spreadsheet to find all the possible factors that significantly influence the performance, we can find errors from some of the calculations and formulas that we use because of data format mistakes or unfit data in the processing. This, of course, must be anticipated and known so it does not cause us to take the wrong conclusion on the factor which has the most influence on the bad performance of the product just because there is an error in our processing.
To help you to identify and anticipate errors in the spreadsheet, then you can use the ISERROR excel formula. ISERROR function in excel will help you to evaluate your data and give TRUE logic value if the value is an error. It is useful to be understood in your processing process on the spreadsheet particularly if the processing has some criteria evaluation process in it.
What is the ISERROR Excel Formula?
ISERROR excel formula is a formula with the usage objective to evaluate a data whether it has an error value or not. If it has, then ISERROR function in excel will give a TRUE logic value and if not, then it will give a FALSE logic value. This function is one of the data type identification functions available in the spreadsheet besides other functions with the IS prefix (ISNUMBER, ISTEXT, etc).
Generally, the input of this formula can be explained as follows:
=ISERROR(value)
Note:
value = data which value wants to be evaluated whether it has an error value or not
How to Use the ISERROR Function in Excel?
The following will explain the writing of the ISERROR function in excel. ISERROR excel formula is pretty easy to use because it only needs data or the process that gives the data result that you want to evaluate with this formula, whether it has an error value or not.
Using ISERROR Excel Formula

Type equal sign ( = ) in the cell where you want to put the result in

Type ISERROR (can be with large and small letters) and open bracket sign after =

Input the data or the process that produces the data / cell coordinate where it is after open bracket sign

Type close bracket sign
 Press Enter

The process is done!
Exercise
After you have learned how to use the ISERROR function in excel, now is the time you do an exercise to deepen your understanding of it!
Download the exercise file and do all the instructions. Download the answer key file to check your results if you have done them or if you are confused about how to do them.
Link of the exercise file:
Download here
Instructions
Use ISERROR excel formula and the IF formula to do all the instructions below Mark the cell contents in column A with “Must Be Fixed A” or “Good” with the marks are written in the column no. 1!
 Mark the cell contents in column B with “Must Be Fixed B” or “Good” with the marks are written in the column no. 2!
 Mark the cell contents in column C with “Must Be Fixed C” or “Good” with the marks are written in the column no. 3!
Link of the answer key file:
Download here
Additional Note
If you want to use ISERROR function in excel with IF and the condition that you want to evaluate is the same as the TRUE result, then you can use IFERROR to simplify your formula writing.