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Excel ISERROR Function

Excel ISERROR function

The Excel ISERROR function returns TRUE for any error type that excel generates, including #N/A, #VALUE!, #REF!, #DIV/0!, #NUM!, #NAME?, or #NULL! You can use the ISERR function together with the IF function to test for an errors and display a custom message, or run a different calculation when found.

Test for any error
Return value 
A logical value (TRUE or FALSE)
=ISERROR (value)
  • value - The value to check for any error.
Usage notes 

Use the ISERROR function to see if a cell contains any error message, including #N/A, #VALUE!, #REF!, #DIV/0!, #NUM!, #NAME?, or #NULL!

For example, =ISERROR(A1) will return TRUE if A1 is is displaying an one of the errors mentioned above , and FALSE if not.

Frequently, value is supplied as a cell address, but you can use it to trap errors inside more complex formulas as well.

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