Permit me to make a guess.

Most questions of this type revolve around the desire to return a value that
a graph will "by-pass", and not cause it to dip to the *zero* line.

If that be the case, try something like this:

=If(A10,1,#N/A)
--

HTH,

RD
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wrote in message
ups.com...
very often I need write a formula like "=if(a10, 1, "")", but the
second value "" really should just be leave the cell blank (doing
nothing). is there anyway of doing that in stead of "".