How could you add or remove elements in a Hash in Perl?

%FM = ( 'Radio City' => 91.1,
              'Big FM' => 92.7,
              'Red FM' => 93.5,
              'Radio One' => 94.3,
              'Radio Mirchi' => 98.3,
              'Fever' => 104.0,
              'Oye FM' => 104.8,
              'FM Rainbow' => 107.1,
              'FM Gold' => 100.7);

# Add one more element to the hash
$FM{'FM Berhampur'} = 100.6;

# Remove one element from the hash
delete ( $FM{'FM Gold'} );

foreach ( keys %FM )
{
    print "$_ => $FM{$_}\n";
}