
w3schools.com
https://www.w3schools.com/excel/excel_count.php
Excel COUNT Function - W3Schools
Apply the =COUNT function to the range A2:A21, which only has cells with letters. It returns the value 0, no cells with numbers found. Range A2:A21 only had cells with letters. Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, PHP, Python, Bootstrap, Java and XML.