applying macro code to a range of cells

hi there
how can i do the following using VBA
making each cell in column A added to each cell in column B and the result will be in the column C
for example
c1=A1+B1
c2=A2+B2
c3=A3+B3
... etc

i know i can do that simply without vba code but I just want to use this method to implement more complex formulas .
thanx in advance

thank you for answering
but what if I wanted to be in limted range for example the code will be implemented from c1 to c6 ?

thanx alot
and happy new year