The syntax for counting the number of unique values from a list of a column using the array formula is as follows: =SUM(IF(COUNTIF(<first cell from which you count the number of unique values>:<last ...

Excel has a number of formulas that enable you to count the time between two dates. You can specify that you would like to count the difference in hours by adding a time specifier to your formula or ...

This calculation can be useful, for example, if you are deciding on the number of sportspersons selected (or rejected) for an event or the number of products approved selected or rejected for export.