How to remove the default zero in a empty cell with formula of Excel

I am trying to find out how to get rid of a zero when a formula is used, but there has not been any data entered in that row yet. For example, as simple as copying another cell, you put =b11, if nothing has been entered in b11 yet, it shows a zero, but I don't' want it to show anything.

There is a example on this I can give you. See the below forumla and they try. I hope this might give you blank result, but you will need ot put the same in the next cell.
=IF(B11="","",B11)
=IF(OR(A2="",B2=""),"",A2*B2)

You do not need a formula for that. You can do that by setting up the value. The value is checked 0 when there is nothing to retrieve. Click on Tools > Options. Select the Display tab. There's an option called zerovalues that should be unchecked. Check for the same or you can even run a search in F1. And if you are not able to find any better help you can try the following - Display or hide zero values

It is easy to do that there are many ways. First you can do the same by using a formula. It is = IF (result = 0, "", result) or 2 Cells Format (user defined): Code: [= 0] ""; standard. Or the last thing you can try is by Tools > Options > View > Remove checkmark from Null value

Hide content with outcome "0" I would solve for conditional formatting. Playing with conditional formatting, you must be able to black or dark gray, the cells in question. Conditionally format font color = background color (usually white) when the cell has the value "0". The result is still there (and may possibly be used for further calculations), but will not appear - so hidden.