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#Perl scripting language how to#
#Perl scripting language code#

#Perl scripting language how to#

Now let us see a few examples of how to define function or subroutine in Perl: Example #1 The above syntax differs if we are using Perl version below 5 as the above syntax for calling subroutine works only in Perl version 5 and above, and if we are using below 5 versions, then we need to use an ampersand (&) before func_name such as “&func_name(parameter_lst)” which is usually not used as it means as bypassing the subroutine prototypes and hence it is not recommended to use.

#Perl scripting language code#

In Perl, subroutines or functions are created or declared using the “sub” keyword before the subroutine name which is given to the set of logical code that is reused in the program and in Perl, the Perl compiler first compiles the program and then executes it irrespective of declaration of subroutines or functions. Hence the subroutines can be reused once written in the entire program. Using subroutine, we call the subroutine when we want to execute this logical code where we need not write the entire logical code repeatedly. The subroutine contains a set of logical code that needs to be executed again and again in the program. The function or subroutine in Perl is defined as the same as other functions in other programming languages.

In this article, we will see how to declare and use the function in Perl programming. In general, the Perl function is defined as a function containing subcodes or a logical set of code to perform some task and can be reused in the program. In Perl programming, language function is also known as subroutine or method, which means the same, unlike in other programming languages, subroutines and functions and methods are different. Therefore instead of rewriting the logical code in the program, we write this logical code inside the function with the name provided to this function and using the same function name to call it in the program whenever the code is needed to be executed. We Just tried our best to cover the right thing and avoid any controversy.In Perl, the function is defined as a set of logical code that can be written within the Perl program, which is in need to write the same logical code again and again. In this article we have not supported and/or rejected, any programming language neither can anyone do it. It is all about the task and the tool best suited for both of the above programming language has different goal and comparing them is a unfruitful task. As a Developer one must choose his tool carefully. The debate of Perl vs Python is very much religious.

Creates problem when the codes are larger say more than 200 Lines.

As scripting, it is slower for a lot of tasks.

Many ways to achieve same result, means unreadable code, which in turn means untidy code.

Can be Imperative, Procedural, Functional or Object Oriented, depends upon need.

Extremely Powerful Programming Language.

Follows Traditional Approach by using Braces for functions and Loops.

Codes wont work if indentation is incorrect.

Force programmer to follow certain convention.

Best for Small task with the help of predefined and keywords and commands.

Often implemented as a core interpretor.

Often used as glue language, working between two distinct interface.

Perl borrows a lot of features from programming languages like c, Lisp, AWK, sed, etc.

Camel, the symbol of perl is not officially declared.

Network Programming, Bioinformatics and Finance are its other area of Application.

Often used in scripting, and one of the Platform to create tools for System Administration.

Perl stands for Practical Extraction and Reporting Language. Perl is a general purpose High Level Programming Language was developed by Larry Wall.

Support for garbage collection and Memory Management.

Procedural Programming i.e., step-by-step Programming.

Functional Programming i.e., computation in terms of Mathematical functions.

Imperative i.e., computation in terms of statements.

OOPS (Object Oriented Programming Language).

Python is best known for its highly readable codes that lets you achieve lot of things in very few lines of code.

Python is a general purpose high level Programming Language was developed by Guido van Rossum.

We are discussing both the Programming Languages their features, pros, cons and a lot more. Both of them has its own Pros and Cons over other. Both Python as well as Perl are used widely as scripting language. Actually the author feels that the debate is very much meaningless. The debate of Python vs Perl is age old and we are not continuing this debate. Update: Dive Deep Into Python Vs Perl Debate – What Should I Learn Python or Perl?