Find key name in hash with only one key?

Question

If I have a hash

my %h = (
    secret => 1;
);

and I know that is only is one key in the hash, but I don\'t know what it is called.

Answer 1

my ($key) = keys %h;

As you're using list context on both sides of the assignment operator, the first item in the keys list gets assigned to $key.