Hello

I have a case in my code , where I am asking user to input either Y or N and if they enter something else I want them to re enter , so I have written a while loop such that 

   print "Do you wish to update (Y/N)?\n";
  
     
     my $choice = <>;
     chomp $choice;

 while ($choice ne "Y" || $choice ne "y" || $choice ne "N" || $choice 
+ne "n")

[download]

but eve if I press Yor N , the flow enters this while loop . so I cant can't understand why ?

In reply to comparison of character by Anonymous Monk

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