How tell if a number is even or odd

How tell if a number is even or odd:

   Function IsEven(Number As Integer) As Boolean
        If Number Mod 2 = 0 Then
            IsEven = True     'return value
        Else
            IsEven = False    'return value
        End If
    End Function

So, how and why does Mod know if a number is even or odd? Mod reveals the remainder after division of an integer. Any integer dividing evenly by 2 will have a remainder of 0. Odd numbers will have a remainder...

Mod = remainder of an integer division (i.e. 9 Mod 2 = 1)

+	addition (i.e. 2 + 3 = 5)
-	subtraction (i.e. 7 - 3 = 4)
*	multiplication (i.e. 3 * 7 = 21)
/	division (remember that the result may not be of the Integer type - i.e. 9 / 2 = 4.5)
\	integer division (always returns an integer result - i.e. 9 \ 2 = 4)
Mod	remainder of an integer division (i.e. 9 Mod 2 = 1)
^	power (i.e. 2 ^ 3 = 8)