use strict;
use warnings;

my $choice;
while (1) {
  print "Please type in 1, 2 or 3 and press enter: ";
  chomp ($choice = <STDIN>);
  last if (($choice eq "1") or ($choice eq "2") or ($choice eq "3"));
  print "Sorry that was invalid.\n\n";
}

print "\nThank you, you entered $choice.\n\nPress ENTER to exit\n";
<STDIN>;