Syntax
ISNUMBER(Value)
Value (required) – This is the value you want to test if it’s a number.
Example
In this example we test a few values. Notice the date is still a number even though it is formatted with a dash to separate the year, month and day.
![ISNUMBER function - 35](http://cdn-5a6cb102f911c811e474f1cd.closte.com/wp-content/uploads/2016/05/ISNUMBER.png)