<?php is_nan(float $num): bool
<?php switch (true) { case \INF === $value: $value = 'INF'; break; case -\INF === $value: $value = '-INF'; break; case is_nan($value): $value = 'NAN'; break; default: $value = (string) $value; if (!str_contains($value, $this->decimalPoint)) {
