Can I nest functions?

[Pauline]

I'd like to use a function that would

 

[Juan Sanchez]

Excel's limit for nesting is 7... i.e

=IF(A1<>0,A1,IF(B1<>0,B1,IF(C1<>0,C1,...IF
(G1<>0,G1,H1)))))))

Cheers
Juan