The second snippet is still wrong. Read up on "|" and "||" in perlop. You should be using the latter.

On to your question:

my @countries = (
   "India",
   "America",
   "Germany",
   "Austria",
);

if ( grep { $_ eq $country } @countries ) {
   print "True";
}
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Or a version that stops as soon as it finds a match:

my @countries = (
   "India",
   "America",
   "Germany",
   "Austria",
);

for (@countries) {
   if ($_ eq $country) {
      print "True";
      last;
   }
}
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Or use a hash to avoid looping except during initialization:

my @countries = (
   "India",
   "America",
   "Germany",
   "Austria",
);

my %countries = map { $_ => 1 } @countries;

if ($countries{$country}) {
   print "True";
}
[download]