Subtracting a 0 from a empty cell and wanting to return a empty cell

Hi I have hopefully a quick question.

I have two cells, the first is a hard 0 and the other is blank for a user to input a value.
They are subtracted from each other with a formula for a final solution.
I have a conditional format that says if it is plus or minus 3 it is good otherwise it is bad.

The problem I have is that the blank is treated as a 0 in excel and returns a 0 to the final value before someone even enters a number in the sheet... Any thoughts on how I can get around this? Thanks.

current 0-(blank) = 0
needed 0-(blank) = Blank, or 0-0=0, or 0-5 = -5 etc...

Hi & welcome to the board.
Maybe something like
=IF(B1="","",A1-B1)

Fluff13 Thank you for your response... That seems to work!

I messed the equation up at first with only one set of " marks then noticed your wrote "" two quotation marks. Can you explain the difference just for my learning?

THanks again!

The double quotes "" represents a blank cell or cell that has no value.

Perfect! Thank you so much for the help!

You're welcome & thanks for the feedback