Format integer with zero-padding

main.dart

void main() {
  {
    var i = 0;
    var s = i.toString().padLeft(3,'0');
    print(s);
  }
  {
    var i = 7;
    var s = i.toString().padLeft(3,'0');
    print(s);
  }
  {
    var i = 42;
    var s = i.toString().padLeft(3,'0');
    print(s);
  }
  {
    var i = 208;
    var s = i.toString().padLeft(3,'0');
    print(s);
  }
  {
    var i = 1515;
    var s = i.toString().padLeft(3,'0');
    print(s);
  }
}