Converts all characters in this string to upper case. If the string is already in all upper case, this method returns this
.
'alphabet'.toUpperCase(); // 'ALPHABET' 'ABC'.toUpperCase(); // 'ABC'
This function uses the language independent Unicode mapping and thus only works in some languages.
// TODO(floitsch): document better. (See EcmaScript for description). String toUpperCase();
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dart.dev/stable/2.5.0/dart-core/String/toUpperCase.html