What are these symbols

Hello fellow forum members.

Excuse my ignorance but I am trying to enter a formula to do a simple running total in Excel 2002 and someone suggested using this formula =IF(B2="","",SUM($B$2:B2))
My question is, what are the symbols "","", between B2= and SUM, and where are they located or where can they be accessed on the keyboard. Thanking you for your time and hopefully help Pedro147

Hi Pedro

I'll explain the whole formula

=IF(B2="","",SUM($B$2:B2))

If the entry in cell B2 is blank ("" - that's two quotes (the two key at the top numerics just above Q and W)) then result is blank ("") otherwise (if it is not blank) result is the sum of the range from B2 to B2 (which may appear to be nonsense in this case). However it is meant to be dragged or copied down to the cell beneath so that it will change the formula B2 to B3, B4 etc as it proceeds to be dragged down so that it will look at the entry in B2,B3 etc and always give the sum from $B$2 to the corresponding row. So if you are looking at say, C9 then the formula would look like =IF(B9="","",SUM($B$2:B9))

Hope this makes sense.