WeIrDcAsE

main.dart

void main() {
  print(toWeirdCase('Wazzap'));
}

toWeirdCase(String str) {
  var result = new List();
  
  for (int i = 0; i < str.length; i++) {
    result.add(i%2 == 0 ? str[i].toUpperCase() : str[i].toLowerCase());
  }
  return result.join();
}