myString.toUpperCase() in ECMAScript 262

Return an uppercase version of the string.

Return Type
String

Description

Note that the original string is not modified.

var msg = "Hello Visitor #589, how are You?";
var msg2 = msg.toUpperCase();
// ** msg2 is "HELLO VISITOR #589, HOW ARE YOU?"
// ** msg is still "Hello Visitor #589, how are You?"