MACROMEDIA FLEX-FLEX ACTIONSCRIPT LANGUAGE, Reference

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34 Chapter 1: ActionScript Basics
This process is also known as a preincrement. In the following example,
age
is incremented after
the test is performed:
if (age++ >= 30)
This process is also known as a postincrement. The following table lists the ActionScript numeric
operators:
Comparison operators
Comparison operators compare the values of expressions and return a Boolean value (
true
or
false
). These operators are most commonly used in loops and in conditional statements. In the
following example, if the variable
score
is
100
, a certain function is called; otherwise, a different
function is called:
// call one function or another based on score
if (score > 100){
highScore();
}
else {
lowScore();
}
In the following example, if the user’s entry (a string variable,
userEntry
) matches their stored
password, the playhead moves to a named frame called
welcomeUser
:
if (userEntry == userPassword) {
gotoAndStop("welcomeUser");
}
Except for the strict equality (==) operator, the comparison operators compare strings only if both
operands are strings. If only one of the operands is a string, ActionScript converts both operands
to numbers and performs a numeric comparison. Uppercase characters precede lowercase in
alphabetic order, so “Eagle” comes before “dog.” If you want to compare two strings or characters
regardless of case, you need to convert both strings to upper- or lowercase before comparing them.
Operator Operation performed
+ Addition
* Multiplication
/ Division
% Modulo (remainder of division)
- Subtraction
++ Increment
-- Decrement