RANDBETWEEN function
Returns a random integer number between the numbers you specify. A new random integer number is returned every time the worksheet is calculated.
Syntax
RANDBETWEEN(bottom,top)
Bottom is the smallest integer RANDBETWEEN will return.
Top is the largest integer RANDBETWEEN will return.
Example
The example may be easier to understand if you copy it to a blank worksheet.
How to copy an example

Create a blank workbook or worksheet.

Select the example in the Help topic.
Note Do not select the row or column headers.
Selecting an example from Help

Press CTRL+C.

In the worksheet, select cell A1, and press CTRL+V.

To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.

