Perl Hash Maps

values can be assigned to hash tables as

  %states=  ("California","Sacramento","Wisconsin","Madison","New York","Albany");  

We can also use => operator to identify the

key to the left, and the value to the right; if the => operator

encounters bare words in key positions, they will be automatically

quoted (note “New York”, however, which consists of two words

and MUST be quoted

  %states=  (California=>"Sacramento",Wisconsin=>"Madison","New York"=>"Albany");  

In above example California is key and Sacromento is value.

Similarily Wisconsin is key and Madison is value.

Printing:

  print "Capital of California is " . $states{"California"} . "nn";  

printing all values(using for loop):

  #!/usr/bin/perl  %states=  (California=>"Sacramento",Wisconsin=>"Madison","New York"=>"Albany");  foreach my $keys(keys %states)  {    print "KEY:$keys VALUE:$states{$keys}n";    }    output  KEY:Wisconsin VALUE:Madison  KEY:New York VALUE:Albany  KEY:California VALUE:Sacramento