The function of the IFERROR function in Excel is to handle formula errors and return custom results. Its main application scenarios include: 1. Handling errors divided by zero, such as replacing #DIV/0! with 0 or other prompts; 2. Used with VLOOKUP to replace #N/A error prompts when data is not found; 3. Improve the readability and professionalism of the table, and replace the output by setting errors to make the table more neat and easy to understand.

The role of the IFERROR function in Excel is actually quite direct, which is to help you deal with formulas that may make mistakes. Many times when we write formulas, the result may be errors for various reasons, such as #DIV/0!, #N/A, #VALUE! and so on. IFERROR is used to "guaranteed". When a formula is wrong, it can return the result you specified, rather than a bunch of incomprehensible error messages.

Handle the case of dividing by zero

This is the most common mistake scenario. For example, if you are doing average calculations or dividing two cells, but the denominator may be 0 or empty, then a #DIV/0! error will appear.

For example:

 = A1 / B1

If B1 is 0 or blank, then this formula will be reported as an error. You can write this at this time:

 = IFERROR(A1 / B1, 0)

It means: If there is no problem in calculation, it will be displayed normally; if there is an error, it will be displayed 0. Of course, you can also display it as other content, such as text such as "no data" and "invalid".

Error prompt for replacing VLOOKUP

Another common application scenario is to use it with VLOOKUP. If the content you are looking for does not exist, VLOOKUP will return #N/A. In this case, wrap it with IFERROR to make the table look tidy.

For example:

 = VLOOKUP("Zhang San", A1:B10, 2, FALSE)

If "Zhang San" is not found, an error will be displayed. You can change it to:

 = IFERROR(VLOOKUP("Zhang San", A1:B10, 2, FALSE), "Not Found")

In this way, users will know at a glance that they didn't find it, not that the formula was written incorrectly.

Improve the readability and professionalism of the form

In addition to functional practicality, the biggest benefit of IFERROR is actually to make the table look cleaner and more professional. You don't want users to see a screen full of #VALUE! or #REF!, right? These error messages not only affect reading, but also make people mistakenly think that there is something wrong with the data.

After using IFERROR, you can set the alternative output when errors are set, such as:

• Shown as 0
• Show as blank (using "")
• Show prompts such as "Data exception" or "Please check"

In this way, when others look at your table, they will not be interrupted by mistakes, and it will be easier to understand the meaning of the data.

Overall, IFERROR is not a high-level function, but it is very practical, especially when dealing with complex formulas or large amounts of data. Just remember to wrap an IFERROR in places where errors may occur, and you can make your form look more friendly and professional. Basically that's it.

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