To give a solution in another cell

[caldera55]

Hi,
how could I make a formula where I obtain a solution in another cell?

For example, I have this data:

A B
4 7

and I put in C2 a formula where I say that if the result of add A2 to B2 is 11 I want in D4 the number 15. How could I make it?

I wrote this:

=if(A2+B2=11;D4=15;0)
but it doesn't work.

Thank you very much

[martindwilson]

you need to put the formula in d4 itself
=if(A2+B2=11;15;0)

[caldera55]

Ok,
thank you very much.