Use :: instead of -> 
if (my $numeral = Scalar::Util::looks_like_number($user_radius)) {

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Scalar::Util does not have an object-oriented interface.

Similarly, you can also import the sub: 

use Scalar::Util qw(looks_like_number);

...

if (my $numeral = looks_like_number($user_radius)) {

[download]

In reply to Re: runtime problem by toolic
in thread runtime problem by jonagondos

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