You're welcome.

IFERROR only works if the formula results in an actual error.. not when it results in "undesired results" ="+" & A2 will always be fine even when A2 is blank.. it will just be "+"

If you were to do something that could result in an error, you can use IFERROR to adjust the result for example

=100/A2

If A2 is 50, it will be 2; if A2 is 1 it will be 100... but if A2 is 0, you cannot divide by 0 so you get a result that says #DIV/0!

=IFERROR(100/A2, "That's an imaginary number!!!") will take all the errors resulting in error (in this case... 0) and replace it with something else.

IF formulas need a condition, a value if true and a value if false...

=IF(condition, value if true, value if false)

IFERROR just requires the original formula, and a value if there's an error.

=IFERROR(formula-which will display correctly when there's no error, value if error)

I know you didn't ask but I thought it might be nice to show you why.