Immediately click the Undo button on the Quick Access Toolbar or use the CTRL Z keyboard shortcut and you will notice that all of the other formulas return to their original state and that the formula in the cell of interest is now different from all of the other formulas in that column.By default, UDF's (User Defined Functions) in Excel VBA are not volatile. Explanation: the non-volatile function is not recalculated when any other cell on the sheet changes. One of the primary advantages associated with using tables in Excel is formula replication – formulas that automatically copy down a column in a table, even as the volume of data changes.However, in some cases you may not want this feature to engage.
Suppose, for example, you use a table to calculate and track sales taxes due on taxable sales in the simplified example presented in Figure Figure 1 - Sample Table Used to Track Sales Taxes Further, suppose that your state offers a “sales tax holiday” and cuts the sales tax rate from 6% to 0% for the first day of the following month.
When the spreadsheet is opened, the cells that contain a formula display "0" instead of the formula output number.
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They are only recalculated when any of the function's arguments change.
A volatile function will be recalculated whenever calculation occurs in any cells on the worksheet. Non-volatile functions are only recalculated when any of the function's arguments change.