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 $choice = <>;
while ($choice ne "Y" || $choice ne "y" || $choice ne "N" || $choice
but eve if I press Yor N , the flow enters this while loop . so I cant can't understand why ?
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