Blank cells

[bresab]

Hi Folks I have a formula in cell c1 =if(a1>b1,1,0)
which is fine
The problem is when I fill the cells down to c10, the result is 0 because the other cells in the formula don't have any numbers yet. I want the cells to be blank,the formula I tried to use is
=isblank(if(a1>b1,1,0),"")
but doesn't work can anyone tell me what I am doing wrong
thank you

 

[njimack]

Maybe this:
=IF(AND(A1*B1,A1>B1),1,0)

 

[JackDanIce]

Try:

=IF(ISBLANK(A1),"",IF(A1>B1,1,0))

 

[bresab]

thanks folks have used Jacks