# Count cells that contain negative numbers

=COUNTIF(range,"<0")

To count the number of cells that contain negative numbers in a range, you can use the COUNTIF function. In the example shown, cell E6 contains this formula:

=COUNTIF(data,"<0")

where **data** is the named range B5:B15. The result is 3, since there are three cells in B5:B15 that contain numbers less than zero.

In this example, the goal is to count the number of cells in a range that contain negative numbers. For convenience, the range B5:B15 is named **data**. This problem can be solved with the COUNTIF function or the SUMPRODUCT function. Both methods are explained below.

### COUNTIF function

The COUNT function counts the number of cells in a range that match the supplied criteria. For example, you can use COUNTIF like this:

To count negative numbers in this example, we need to use the less than operator (<) with zero like this:

=COUNTIF(data,"<0") // returns 3

To include zero in the count, use the less than or equal to operator (>=):

=COUNTIF(data,"<=0") // returns 4

Notice that the *criteria* is enclosed in double quotes (""). COUNTIFS is in a group of eight functions that share this syntax.

### SUMPRODUCT function

Another way to solve this problem is with the SUMPRODUCT function and Boolean algebra:

=SUMPRODUCT(--(data<0))

Working from the inside out, this expression checks if values in **data** (B5:B15) are less than zero:

data<0

Because **data** contains eleven cells, the result from this expression is an array that contains 11 TRUE and FALSE values:

{FALSE;FALSE;FALSE;TRUE;FALSE;FALSE;TRUE;FALSE;TRUE;FALSE;FALSE}

To convert the TRUE and FALSE values to 1s and 0s, we use a double negative (--):

--{FALSE;FALSE;FALSE;TRUE;FALSE;FALSE;TRUE;FALSE;TRUE;FALSE;FALSE}

The resulting array inside the SUMPRODUCT function looks like this:

=SUMPRODUCT({0;0;0;1;0;0;1;0;1;0;0}) // returns 3

With a single array to process, SUMPRODUCT sums the array and returns 3 as the result.

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