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Flash ASCII and Unicode Characters
The String class is used to represent string (textual) data in ActionScript 3.0. ActionScript strings support both ASCII and Unicode characters. The simplest way to create a string is to use a string literal.
To use single quotation marks (') within a string literal defined with single quotation mark (') delimiters, use the backslash escape character (\). Similarly, to use double quotation marks (") within a string literal defined with double quotation marks (") delimiters, use the backslash escape character (\). The following two strings are equivalent:
var str1:String = "That's \"A-OK\"";
var str2:String = 'That\'s "A-OK"';