Something like the following would work:

my $choice;
while (1) {
    print "\nDo you want to continue : ";
    chomp($choice = <STDIN>);

    if ($choice eq "y" || $choice eq "n") {
        last;
    } else {
        print "\nERROR:Invalid Choice\n";
    }
}

[download]

Note: use eq and ne for string comparison. == and != are used for numerical comparisons

In reply to Re: Continure when "y" and none for "n" by wind
in thread Continure when "y" and none for "n" by Anonymous Monk

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