my %data = (
   'keyA'  => 'valueA',
    keyB   => 'valueB', # fancy => allows bareword
   'keyC'  ,  'valueC', # equivalent
);
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See perlop and perldata. And be carefull with terminology: better say only 'array' (the @ variable), 'hash' (the % variable) and 'list' (no variable), because a list is something quite different from an array and a hash is not too much an array.

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