When you have kidney disease, your kidneys are no longer able to remove waste effectively from your body or to balance your fluids. The build up of wastes can change the chemistry of your body causing some symptoms that you can feel, and others that you don't.
Reference to a range of cells is typically of the form (A1:A6), which specifies all the cells in the range A1 through to A6. A formula such as =SUM(A1:A6) would add all the cells specified and put the result in the cell containing the formula itself.
If the range might contain a blank cell, you should use the ISBLANK function to test for a zero value, as in the following example: Note that the above formula returns zero if there is a zero value in the cell, blank if the cell is blank, and other if anything else is in the cell.f you are checking a cell for a zero value and the cell is blank, the test evaluates to true. For example, if you have the following formula in cell A1.