Answers for "make string uppercase in flutter"

string to capital letter dart

extension CapExtension on String {
  String get inCaps => '${this[0].toUpperCase()}${this.substring(1)}';
  String get allInCaps => this.toUpperCase();
  String get capitalizeFirstofEach => this.split(" ").map((str) => str.capitalize).join(" ");
}

final helloWorld = 'hello world'.inCaps; // 'Hello world'
final helloWorld = 'hello world'.allInCaps; // 'HELLO WORLD'
final helloWorld = 'hello world'.capitalizeFirstofEach; // 'Hello World'

flutter uppercase text style

Text('Aposté todo a tu risa y perdí la mía. - JZ'.toUpperCase(), style: TextStyle(fontSize: 16.0, fontWeight: FontWeight.bold))