There are times when it is helpful to know if a cell contains something—it doesn't really matter what it contains, just so it contains something. In these instances there are two ways you can approach the problem.

The first solution is to simply use the LEN function to determine if there is a length to what is contained in a cell. For instance, let's say you wanted to check if there was a value in cell F1. You could use the following:

=IF(LEN(F1)>0,"Found something there","Nothing is there")

If there is nothing in cell F1, then the length will be equal to zero. If there is something in the cell, even a number, then the length will be greater than zero.

The second solution is a variation on the LEN approach. All you need to do is check to see if there is anything in the cell. This may sound odd, but it is easier when you see the formula. For example, the following will check to see if there is anything in cell B4:

=IF(B4<>"","Found something there","Nothing is there")

The test in this formula is True if there is anything in the cell. If the cell is empty, then the test fails.

Another solution you can use is the ISBLANK worksheet function. This function returns True if the target cell is blank, and False if it contains anything.

As an example, let's suppose you want to check if the user has entered something in cell D7. You can use the following to make the determination:

=IF(ISBLANK(D7),"Input values missing",D7)

In this case the cell containing this formula would contain the same value as in D7, provided something was there. If there is nothing in D7, then the cell contains the text "Input values missing."