It produces the ZERO message :) Matching the whole string produces better results:
#!/usr/local/bin/perl
use strict;
use warnings;
my $value = 10;
SWITCH: for ($value) {
/^0\z/ && do {print "ZERO\n"; last; };
/^1\z/ && do {print "ONE\n"; last; };
/^10\z/ && do {print "TEN\n"; last; };
print "NONE OF THE ABOVE\n";
}
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