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  1. or download this
    printf " %s At ($row, $col) the row is %s and the column is %s for EUR
+ & NAM \n",
    $feedback_value, $my_row, $my_column;
  2. or download this
    printf " %s At (%s, %s) the row is %s and the column is %s for EUR & N
+AM \n",
    $feedback_value, $row, $col, $my_row, $my_column;
  3. or download this
    my $power = '95%';

...
for (0..$#data) {
    printf($fmt, $_, $data[$_]);
}