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Flash - Intro to Functions

505 ActionScript
Flash Compatibility: MX

Written by: Phil

Length: 1800 words

Assumed Knowledge : Understand variables, be able use buttons, text boxes and expert mode actions.


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This tutorial explains what functions are for and goes through the syntax. There are two Flash movies to download which use simple functions and a detailed explanation of how to create one of these. If you are unsure about variables you should do that tutorial first. Click here to for: ActionScript Variables


Procedures, Subroutines or Functions


In programming procedures enable you to create a prototype for a particular action. Instead of writing the same piece programming again and again, every time you what to do a specific action, you create a standard piece of code which you call upon when you need it. This is called Procedural programming or a Subroutine. In Flash it is called a Function.


Think of a function as a 'thing' that does a specific job. For example a toaster does a specific job. You put in a piece of bread and out comes toast. You would not expect a toaster to do the washing. A function is like that. It does a specific job. Once you have created it (and it works) you no longer need to worry about how it works. Just like a toaster. You put bread in, toast comes out. Simple eh!


Advantages to using Functions


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