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Perl Hash Indices List, keys() Function

Tutorials Perl

Topic

What is keys() Function in Perl programming?



Explanation

The keys() function is used to retrieve list of indices from a hash.

Syntax: 
    keys hash;
Example: 
    #! C:\programfiles\perl\bin\perl
    print "content-type: text/html\n\n";
    %emp = ('empno' => '12422' , 'empname' => 'Kate Anderson', 
              'empph' => '9167552148', 'empcode' => 'ADS212');
    foreach $key (keys %emp) 
    {
      print "$key\n";
    }
Result: 
    empcode empname empph empno

In the above example using the keys() function all the keys of the hash "emp" is displayed using a for each loop.






A Note
Simple introduction, basic CGI perl programming codes with examples. Do send your feedback or suggestions on this tutorial. This is a copyright content.

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