map Size in Perl

In Perl, we can get the size of a hash using the scalar function. The scalar function returns the number of key-value pairs in the hash.

Here's an example:

# declaring a hash
my %hash = (
    "apple" => 2,
    "orange" => 3,
    "banana" => 4
);
# getting the size of the hash using scalar function

my $hash_size = scalar keys %hash;
print "The size of the hash is $hash_size.\n";

Output:

The size of the hash is 3.

In the above example, the scalar function is used with the keys keyword to return the number of keys in the hash %hash. Finally, we assign the result to the scalar variable $hash_size and print it.