MACROMEDIA FLASH 8-LEARNING ACTIONSCRIPT 2.0 IN FLASH Manual page 199

About the conditional operator
The conditional operator is a ternary operator, which means that it take three operands. The
conditional operator is a short-hand method of applying the
Operator Operation performed
Conditional
?:
For information on using the conditional operator and an example, see
conditional operator and alternative syntax" on page
Using operators in a document
In the following example, you use the
arbitrary number of decimal places. This method rounds the value of the
down to the nearest integer, and then returns the value. After you slightly modify the
ActionScript, you can make Flash round numbers to a certain number of decimal
places instead.
In the next example, you also use the division and multiplication operators to calculate a user's
score based on the number of correct answers divided by the total number of questions that
are asked. The user's score can multiply by a number and display to get a score between 0%
and 100%. Then you use the addition operator to concatenate the user's score into a string
that is displayed in the Output panel.
To use operators in ActionScript:
1.
Create a new Flash document.
2.
Type the following ActionScript on Frame 1 of the main Timeline:
var correctAnswers:Number = 11;
var totalQuestions:Number = 13;
//round to the nearest integer
//var score:Number = Math.round(correctAnswers / totalQuestions * 100);
//round to two decimal places
var score:Number = Math.round(correctAnswers / totalQuestions * 100 *
100) / 100;
trace("You got " + correctAnswers + " out of " + totalQuestions + "
answers correct, for a score of " + score + "%.");
152.
method to round calculations to an
Math.round()
conditional statement:
if..else
"About the
parameter up or
x
About operators 199