Using JScript.NET to make asp.net Web page Basics Tutorial 2

In order to implement the JScript.NET inference variable type function, you need to follow the following rules!
A Always declare your local variables. This may seem obvious, but it's very important that JScript.NET only infer your local variables, not the global variables. If you don't declare it, use it directly, it will become a global variable and it will not be optimized.
Two Using only one data type, if you declare a numeric variable and use it to store character-type data, JScript defines the variable as generic Object or Variant.
Cannot infer type--Glob is a global variable
var glob = 42;
function MyFunc ()
{
Cannot infer type--S is not defined so it is treated as a global variable
s = "Hello";
Types can be inferred
var i = 0;
Cannot infer type-Q is assigned to another type
var q = new Date ();
Q = 3.14159;
}
Although type inference is a very good feature, it has some drawbacks. It does not help us to capture type mismatches or other errors. To solve this problem, JScript.NET provides a way to explicitly define the type of a variable. By example, you will easily understand how it is used.
Defining numeric types
var myint:int = 42;
Defines a function that returns a string
function GetName (): String
{
Program Line
}
Defines a function with two parameters to return a logical type
function CheckNumber (dval:double): Boolean
{
function code
}