This avoids assuming the size of an integer. 
sub dec_2_bin {
  my @nib=qw (000 001 010 011 100 101 110 111);
  map $nib[$_], split( //, sprintf "%lo", $_[0]);
};

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In reply to Re: Base10 to Base2. by rir
in thread Base10 to Base2. by Anonymous Monk

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