
foo {
    $num: random();
    $is-number: type-of($num) == number;
    $is-within-range: $num >= 0 and $num < 1;

    @for $i from 1 through 1000 {
      $num: random();
      $is-number: $is-number and type-of($num) == number;
      $is-within-range: $is-within-range and $num >= 0 and $num < 1;
    }

    is-defined: $num != "random()";
    is-number: $is-number;
    is-within-range: $is-within-range;
}
