my $subst;

for my $hour (5, 12) {
	$hour > 10 ? $subst = 0 : $subst = 86400;
	print $subst, "\n";
}

for my $hour (5, 12) {
	$subst = $hour > 10 ? 0 : 86400;
	print $subst, "\n";
}

## output
86400
86400
86400
0