note toolic Use :: instead of -> <c> if (my $numeral = Scalar::Util::looks_like_number($user_radius)) { </c> <p>[doc://Scalar::Util] does not have an [doc://perlootut#Methods|object-oriented interface]. <p>Similarly, you can also import the sub: <c> use Scalar::Util qw(looks_like_number); ... if (my $numeral = looks_like_number($user_radius)) { </c> 1003864 1003864