Excel

[Kerplunk]

Hi guys. In Excel what formula do I need to do the following: If 2 cells are empty then a third cell is also empty otherwise the third cell = a formula. EG. if A1 & B1 = empty, then C1 = empty otherwise C1=A2+A3

[Metaphysical]

If I've got this right then the formula in C1 should be as follows:

=IF((AND(A1="",B1="")),"",A2+A3)

[Kerplunk]

Thank you very much.