Variable and Constant Difference

1) The book presents some examples of variables as you see below. It says the stuff on the left of the equilibrium are variables the stuff on the right of the equilibrium are values.

x = 1
x = x + 1
Interest Rate = 0,075
DataEntered = False
x = x + 1
MyNum = YourNum*1,25
UserName = "Bob Johnson"
DateStarted = #12/14/2009#

I also know that named values are called "Constants" and variables of which type aren't specified are "Variants" (These variables aren't specified so they should be called variants)

As you see there is a concept mess. Can you clear it?


2) DateStarted = #12/14/2009#

Do we present dates in "#"?

I don't understand the examples you give.