Custom data validation

So far, you could find a lot of texts on the web site “Excel Kitchenette” about data validation. Most of them were about lists, since this functionality is often used, and further the choice of data type, setting the text length, number range or date were mentioned … When activating the Data Validation option, there are also custom rules, where it is possible to enter a formula based on which the validation is being performed.

Cell content testing

There are several functions in Excel that literally serve to “find the cell in time and space”. They can be used to identify the row and column in which the cell is located, count the rows or columns, determine the type of value that the cell contains … By themselves, these functions are seldom used. In combination with other functions, in conditional formatting, and especially with data validation, they can be irreplaceable.