#!/usr/bin/perl

use strict;
use warnings;

sub func {
    my $context = wantarray;
    print  "VOID"   if not defined $context;
    return "SCALAR" if     defined $context && !$context;
    return "LIST"   if                          $context;
}

print "Context is: "; func (); print "\n";
print "Context is: ". func (); print "\n";
print "Context is: ", func (); print "\n";
 
__END__
Context is: VOID
Context is: SCALAR
Context is: LIST