ASP Sub Procedures

ASP Sub Procedures are a collection of ASP statements that perform a task, and are executed by an event procedure. Event Procedures are any clickable objects, or onload event. Sub procedures do not return a value, but executes it‘s content on "call".

This is an asp sub procedure that is used to write information stored in variables:
 

<% Sub GetInfo() dim name,telephone,fee name="Mr. John Doe" telephone="555-5555" fee=20 Response.write("Name: "& name &"<br>") Response.write("Telephone: "& telephone &"<br>") Response.write("Fee: "& fee &"<br>") End Sub GetInfo() %>

This example simply declares, populates, & writes three variables in the asp sub procedure, ‘GetInfo‘. This sub is executed right after the end sub.   Here is the execution result:   Name: Mr. John Doe Telephone: 555-5555 Fee: 20

 
You can pass an argument to the asp sub procedure, and provide the value(s) when calling it.
This is an asp sub procedure that accepts an argument:
 

<% Sub circle(r) dim pi,area,diameter,circum pi=3.14 area=pi*r^2 diameter=2*r circum=2*pi*r Response.write("The Circle with a radius of: "&r&" has the area of: "&area) Response.write(", the diameter of: "&diameter&" and a circumference of: "&circum) End Sub %>

Here is the execution result:   The Circle with a radius of: 2 has the area of: 12.56, the diameter of: 4 and a circumference of: 12.56

ASP Function Procedures ASP Function Procedures are a series of VBscript statements enclosed by the ‘Function‘, and ‘End Function‘ statements. Function procedures are similar to a ‘Sub procedure‘, but can also return a value. An asp function procedure can accept arguments (constants, variables, or expressions) that are passed to it by calling a procedure).   This is a none-parameterized asp function procedure:   <% function userName() userName="MaryLou" end function %>   This function procedure remembers a username. You can use this function any number of times in your program, and you can change it once to maintain it- use ‘userName()‘ to call this function. For example: response.write("The username is: "&userName())   This is a parameterized asp function procedure:   <% Function total(price) dim tax tax=price*.09 total=price+tax end Function %>   The price value is provided when calling the function- Example: response.write("The total price is: " & total(50)) This is an asp function procedure that accepts an argument:   <% Function profit(sellPrice, cost) dim pr profit=sellPrice-cost End Function dim currProfit currProfit=profit(1280,890) Response.write("Profit: $"&currProfit) %> Here is the execution result:   Profit: $390