Pass key and get value

    

%hash = ();

$hash{fruit} = apple;
$hash{sandwich} = hamburger;
$hash{drink} = bubbly;

print $hash{sandwich};

1.	An associative array, called a hash, is an unordered list of key/value pairs, indexed by strings.
2.	Associative arrays or hashes
3.	Create hash from scalar variable
4.	Create hash with => operator
5.	Create hash with qw
6.	Create hash without using the quotation marks
7.	Creating and accessing hash elements
8.	Hash example
9.	Hashes: An associative array
10.	Mix scalar, list and hash
11.	Using the => operator.
12.	Setting values into a hash named %hash
13.	Empty hash
14.	Converting a hash into an array by simple assignment
15.	List context and hash context

Pass key and get value : Hash Definition « Hash « Perl