I was wondering how you would make a function for a whole columns by using other columns in the function. So for example column C = A + B. and this would work for the whole column not matter what the row is. Note: I do know how to select a whole column. :)

EDIT: what i am meaning is that for c3 c4 c5 c6 ect all have the function that the a3+b3 = c3 then a4+b4=c4 and so on and so forth

Thanks in advance