Boolean logic: The method used to evaluate conditions, returning either TRUE or FALSE. Logical functions: The primary logical functions in Excel that enable you to apply Boolean logic are AND, OR, XOR ...

In Excel, you can either use the ISEVEN function to determine even numbers; if the number is even, it will return TRUE; if odd, it will return false.

Learn how to use the ISNUMBER function in Excel. The ISNUMBER function's purpose is to return TRUE if the function is a number.