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 ::   Tutorials
 ::   Presentations
Perl & CGI tutorials
 ::   Intro to Perl/CGI and HTML Forms
 ::   Intro to Windows Perl
 ::   Intro to Perl 5
 ::   Intro to Perl
 ::   Intro to Perl Taint mode
 ::   Sherlock Holmes and the Case of the Broken CGI Script
 ::   Writing COM Components in Perl

Java tutorials
 ::   Intro to Java
 ::   Cross Browser Java

Misc technical tutorials
 ::   Intro to The Web Application Development Environment
 ::   Introduction to XML
 ::   Intro to Web Design
 ::   Intro to Web Security
 ::   Databases for Web Developers
 ::   UNIX for Web Developers
 ::   Intro to Adobe Photoshop
 ::   Web Programming 101
 ::   Introduction to Microsoft DNA

Misc non-technical tutorials
 ::   Misc Technopreneurship Docs
 ::   What is a Webmaster?
 ::   What is the open source business model?
 ::   Technical writing
 ::   Small and mid-sized businesses on the Web

Offsite tutorials
 ::   ISAPI Perl Primer
 ::   Serving up web server basics
 ::   Introduction to Java (Parts 1 and 2) in Slovak


introduction to web programming
Using scalar variables  
The benefit of substituting a scalar variable name for a value is that we can then manipulate its value. For example, you can "auto-increment" a scalar variable using the "++" operator:

    $number = 1;
    print "$number\n";
    print "$number\n";

Perl would send the following to standard output


You can also perform arithmetic such as:

    $item_subtotal = $item_price * $quantity;
    $shipping_price = 39.99 * $quantity;
    $grand_total = $item_subtotal +

Scalar variables are the meat and potatoes of CGI. After all, translating between the client and the Web server is essentially the formatting and the reformatting of variables. Be prepared to see them used a lot.

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