-digit numeric
-character-string,

and the data we can add the value of a particular service before the data, such as plus signs, minus percent and so forth. All scalar variables using the dollar sign “$” as the beginning of the name.

Example of the correct name of the variable:

$ example
$ canlongcharacter
$ corect_name_scalar_variabel

instance Wrong variable name

$ Example
scalar variable $ name is incorrect

Keep in mind that the use of letter writing in the scalar variable is very sensitive to the difference between capital and lowercase letters. So if you make $ skalar number of variables, then you can not be called with the variable $ scalalr TOTAL
operator in manipulating the use of scalar variables is very flexible. Note the examples of the following cases:

$ a = 2;
$ b = 6;
$ c = $ a. $ b; # The “.” service integration 26
a # character
$ d = $ c / 2;
print $ d;

the results are:

13

On the use of characters, there are several things that need to be
Single-quoted or single quotation

* Double quoted or quotation double

single quotation generally will not translate what is in it. While the quotation ganda translate what is there in it, including variables.note the following example:

#! / usr / local / bin / perl-w
# Show warnings
$ who = ‘Yon Yonson’;
$ where = ‘Wisconsin’;
$ what = ‘in a lumbermill’;
print “My name is $ who, \ n”;
# Let’s introduce ourselves

print “I live in $ where, \ n”,
“$ What I work there. \ N”;
# Remember the line breaks
print “\ nSigned: \ t $ who, \ n \ t \ t $ where. \ n”;

the results are:

My name is Yon Yonson,
I live in Wisconsin,
I work in a lumbermill there.
Signed: Yon Yonson,
Wisconsin

The special characters in, among others:

Character printing results
\ b Backspace
\ c the line is terminated without newline
\ f formfeed
\ n newline
\ r Carriage return
\ t tab character
\ \ Reversed virgule character
\ nnn the character has ASCII value nnn,
where nn is 1 to 3 octal digit number

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before you may need to read about practitioner programming perl, ok next,.
The easiest ways to run the program is to call the perl interpreter and perl program name as argument
perl example.pl
Name of program or file is example.pl perl and perl is the name of the perl interpreter. Of course the above perl program assumes that the perl path is known, if not then we need to call the full path as follows:
/ usr / local / bin / per example.pl
Well if you are using Windows 98 or Windows NT, you can call in a way that is almost the same, namely:
C: \ Ntperl \ perl example.pl
Of course the way in making up a bit. For that we can simplify the called without including the name of the perl interpreter, so just the name of the file perl-its only

example.pl

There are several things that must be done on a Unix system, namely:
1. Adding the full path location of the perl interpreter on file dibaris first perl program as follows:

#! / usr / local / bin / perl
# Name of Program: hello.pl
print “Hello World \ n”;

2. So that the perl program file can be executed directly, it is necessary to change the file mode as the mode of execution of the file system UNIX, that is

Chmod + x example.pl

On Windows systems, to make a perl program can be executed directly, it can be done by making the association between the file extension .Pl and perl programs. So every file ending pl will executed by perl programs, precisely active perl

MAKE PERL SCRIPT “HELLO WORLD”
Perl script is a text file that consists of a set of commands perl. Here are some general provisions to note:

1. Empty spaces at the beginning of the line will be ignored
2. Perl command terminated with semicolon or a semicolon “;”
3. Fence or a sign “#” will be defined as where the comment behind will be ignored
4. On Unix systems, the first line of the program included the location of perl, for example #! / Usr / local / bin / perl

Well, you see the program first, hello world!

#! / usr / local / bin / perl
# Name of Program: hello.pl
print “Hello World \ n”;

let’s do the following steps:

$ Perl hello.pl
Hello world

Or

$ Chmod + x hello.pl
$ Hello.pl
Hello world
$

TYPE DATA

There are several main types of data types, namely:

Scalar
* Array
* Assosiatif array (array continued)

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Perl (Practical extraction and Report Language) is created by Larry Wall. Perl is a compiler language interpreters at a time similar to java, perl can detect any line to find the syntax error before the program is run.

many people use Perl for the development of the home combined with CGI. a lot of software that was developed in the Internet and the primary language is the use of perl, for example one that is MRTG (software monitors internet traffic). perl programmers can learn quickly, because perl is similar to the C language, for example, a “;” at the end of the command.

Perl itself is a program created specifically for UNIX. However, for users 95 and windows NT windows can still use Perl for Win32 as activePerl (according to the name of the web address for Win32 Perl is. Active Perl made after Perl 5 version for Unix distributed.

WHY NEED PERL?

Operating systems supported

* Perl from Unix systems started as a system administration.
* Perl work on Macintosh machines – see The MacPerl Pages on http://www.macperl.com/ and
* Perl is also working on the Microsoft-based machines – see ActiveState Tools Corp. at http://www.activestate.com/.

Featured basic Perl

* Perl take features from other programming languages such as C, awk, sed, sh, and BASIC.
* Perl also runs with third-party databases such as Oracle, Sybase, postgres, and the other through the abstract database interface called dBi.
* Perl can work with HTML, XML, and mark-up languages other.
* Perl has Unicode support.
* Perl is and will always be Y2K compliant.
* Perl supports procedural and object-oriented programming.
* Perl can berantarmuka library-library with C / C + + XS through external or SWIG.
* It will support development of Java-Perl Lingo (JPL)

Perl was developed by perl5porters or for short p5p this is open source,. Perl 5 is very extensible and has more than 400 third party modules available on the Comprehensive Perl Archive Network (CPAN). addition, the perl (the interpreter of Perl) can be embed in the system to another.

Perl is the most popular programming language for web perl for web features with text manipulation and with the rapid development cycle, Perl known as “the duct-tape of the internet”. CGI.pm is the standard distribution of Perl CGI.pm Perl.Modul create a HTML form handling so much easier. addition, Perl is also capable of handling encrypted Web transactions, including for the purpose of e-commerce.Perl can embed in web server to speed prosesing to 2000%. View http://perl.apache.org, Apache web server to use mod_perl to embed the Perl interpreter, Netscape web server nsapi_perl can use to embed the Perl interpreter, and use the Perl package dBi, web-database integration becomes easier .

Perl is used by many Corporate giants such as Amazon.com and Deja.com, Perl can embed in web server to speed prosesing to 2000%. See the website http://perl.apache.org

Next (step to run perl)

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