FizzBuzz Rule Order - Dart Programming

FizzBuzz is the classic test of else if ordering: % 15 has to be checked first, otherwise 15 would match % 3 and get labeled Fizz. The loop appends one label per value and a final join builds the deterministic summary.

Program

Play the program to label four numbers with FizzBuzz rules.

fizzbuzz.dart

void main() {
  var values = [15, 3, 5, 16];
  var labels = <String>[];
  for (var n in values) {
    if (n % 15 == 0) {
      labels.add('FizzBuzz');
    } else if (n % 3 == 0) {
      labels.add('Fizz');
    } else if (n % 5 == 0) {
      labels.add('Buzz');
    } else {
      labels.add('$n');
    }
  }
  print(labels.join(','));
}

rule order `% 15` is checked first; otherwise `15` would match `% 3` and stop as `Fizz`.

else if chain Only one arm runs per iteration; once a match wins, the rest are skipped.

collect then join Appending to `labels` and joining once at the end keeps the final string deterministic.