Hashes are good for this sort of work, the question number is the hash key and the answer is the hash value related to that key, read this intro as well, there are many ways to declare a hash, here I assigned an array to a hash...the program uses a label called "CHECK" to control its flow...If the letter choice corresponds to a key in the hash then that hash value would be defined and you would see the answer, else the program would go back to the label "CHECK:" and prompt you to answer the question once again.. 
use strict;
use warnings;
my @array = qw(a Grant b Yoda c Liberace d None);
my %hash= @array;

CHECK:
print "Who's Buried in Grant's Tomb\n";
print <<ENDING;
a. Grant
b. Yoda
c. Liberace
d. None of the above.
ENDING

while(chomp(my $answer = <STDIN>)){
        if(defined $hash{$answer}){
                print "your Answer is \"$hash{$answer}\".\n";
                print "Thank You.\n";
                #do anything with the Answer....
                exit;
                }else{
                        print "Please Pick a letter between A - D\n";
                        goto CHECK;
                        }
        }

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Excellence is an Endeavor of Persistence. Chance Favors a Prepared Mind.

In reply to Re: while loop almost correct by biohisham
in thread while loop almost correct by irvson

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