# Chapter 9. Using Conditional Logic

Every day we're confronted with all kinds of situations large and small that require us to make decisions about what actions we'll take. Although we may not be doing it consciously, we're constantly saying to ourselves, "If this is the case, I need to do this": If it's hot, wear shorts; if it's rainy, wear pants; and so on. This process of taking different actions based on current circumstances, or conditions, is known as conditional logic and it's something we all apply naturally.

Conditional logic is a critical component of interactivity. It allows you to program your project to react intelligently to the movement or position of the mouse, to the current day of the week, and to many other dynamic conditions that exist as your movie plays. By employing conditional logic, you can transform simple linear presentations and animations into dynamic projects that offer a unique experience each time they're viewed.

##### A successful rocket launch demands perfect conditions. This lesson's project will emulate a launch to demonstrate some of the principles and techniques used in conditional logic.

In this lesson, we'll introduce you to some of the ways you can use conditional logic to bring about graphical changes in your movies based on varying conditions.

WHAT YOU WILL LEARN

In this lesson, you will:

• Learn how to control your script's flow using if , if/else , and if/else if statements

• Become familiar with the various operators used in conditional logic and their functions

• Script a project to react to various conditions

• Create a scripted boundary to restrict an object's movement

• Turn a script on and off using conditional logic

• Program a project to react to user interaction

• Learn how to detect and react to object collisions

APPROXIMATE TIME

This lesson takes approximately 1 hour to complete.

LESSON FILES

Media Files:

None

Starting File:

Lesson09/Assets/rocketLaunch1.fla

Completed Project:

rocketLaunch6.fla

Macromedia Flash MX ActionScripting: Advanced Training from the Source
ISBN: 0201770229
EAN: 2147483647
Year: 2002
Pages: 161