How to count x's in column but not blanks

I have a column Example column C10 thru C25. Some cells have x's in column. I need to count the x's . I want the count in C8 and if there are no x's, I want the result cell blank.

I have used the following formula, but I don't know how to get the cell to be blank when there are no x's in the column.

Formula I am using is:

 =COUNTIF(C10:C25,"x")

Thanks for the help in advance.