while 

• The while loop also performs iteration and in CGI scripts is primarily for reading lines in a file. The while loop can be used to read and print out every line of a file with the following syntax: 

open ([FILE_HANDLE_NAME], "[filename]");
     while (<[FILE_HANDLE_NAME]>)
       {
       print "$_";
       }
     close ([FILE_HANDLE_NAME]);

• The script would print out every line in the file "filename" because the "$_", the Perl "default" variable, represents "the current line" in this case. 

Additional Resources:

• Perl 
• Perl Resources 

foreach
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