number of keys in a hash

[EfratS]

Hi,
how can I know the number of keys I have in a hash?

Thanks.

 

[figmatalan]

%hash = (1 =>1, 2 => 2, 3 => 3);

@keys = keys(%hash);
$numkeys = @keys;

print $numkeys;

There will be better ways I'm sure, but you will end up with an array of the keys too in @keys

 

[figmatalan]

Or you can just do:

$numkeys = keys(%hash);