Upgrade from Vbscrpit to Vb7 (i) Variable declaration and use

We all know that the ASP is using VBSCRIPTM, and it is VBA (suitable for Office products), and VBA is a subset of VB,
Now the asp+ adopts VB as the program language, and the ASP produces a great difference.
(i) Declaration and use of variables
asp+ the data type of a variable directly with Dim
For example: Dim x As String and not allowed in ASP
asp+ set initial value problem directly with Dim
For example: Dim A As string= "I am a character" and is not allowed in ASP
asp+ when declaring multiple variables with Dim, the data type of each variable is the same
For example: Dim x,y As Integer
Length of numeric type
Byte 1 bytes
Short 2 bytes is equivalent to the integer of VBScript
Integer 4 bytes The equivalent of VBScript long
Loing 8 bytes
Single 4 bytes
Double 8 bytes
Decimal bytes This is new