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Table of Contents
Main
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Perl Overview:
-What is Perl?
Getting Started:
-Installing Perl
/ Unix
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Writing Code:
-Hello World!
/ Basic Output
/ Adv. Output
-Variables
/ Scalar
/ Arrays
/ Joining Arrays
-File/Directory
/ Opening
/ Saving
/ Modifying
-Subroutines
/ Calling
/ Feeding
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3.1 - Scalar Variables
One important part of any programming language is variables. Variables give you the ability to create dynamic applications, and store temporary information. Unlike some languages, in PERL you do-not have to declare the variables before you use them. Below are a few examples of how scalar variables can be used.
- $bob = "bob"; #Declare bob as bob
- $jerry = "jerry"; #Declare jerry as Jerry
- $bob = $jerry; #Bob now equals Jerry
Here is some example code on howto append scalar variables.
- $name = "John";
- $last = "Doe";
- $firstlast = $name . $last;
- $firstlast = "First: " . $name . " Last: " . $last;
The following will do the same thing.
- $name = "John";
- $last = "Doe";
- $firstlast = "First: " . $name;
- $firstlast .= " Last: " . $last;
Ready to move onto Arrays?
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