Flash CS3 Documentation

Programming ActionScript 3.0 > Working with strings > Converting strings between uppercase and lowercase

Converting strings between uppercase and lowercase

As the following example shows, the toLowerCase() method and the toUpperCase() method convert alphabetical characters in the string to lowercase and uppercase, respectively:

var str:String = "Dr. Bob Roberts, #9."
trace(str.toLowerCase()); // dr. bob roberts, #9.
trace(str.toUpperCase()); // DR. BOB ROBERTS, #9.

After these methods are executed, the source string remains unchanged. To transform the source string, use the following code:

str = str.toUpperCase();

These methods work with extended characters, not simply a-z and A-Z:

var str:String = "José Barça";
trace(str.toUpperCase(), str.toLowerCase()); // JOSÉ BARÇA josé barça

Flash CS3