We use the my keyword to lexically scope a variable and thus it will only be available to its current block.Ī while loop executes as long as the specified condition holds. Perl is a general purpose, high level interpreted and dynamic programming language. As the size of the program grows so as the number of global variables and this is considered bad programming practice. Here, we have initialized the variable name without using the my keyword, this makes it a global variable. Instead of using the my keyword we can just declare variables without is, for example: $name = "Alice" Hashes can also be nested, for example: my $inventory = \n" My = sort = reverse hash is a key-value pair, for example: my %user_profile = ( Print can also sort arrays and reverse as follows: my = (23, 11, 13, 47) We initialize arrays as follows: my = ("string1", "string2", "string3") Here we look at all three by examples, for more detailed documentation. In Perl we have scalars, arrays and hashes variables. Quotes.įor string literals we can use either single or double quotes, however when we are using special characters such as tabs( \t) or newline characters( \n) we use double quotes: In Perl, comments are preceded with a # character as can be seen from the above code snippet. s Beginners Introduction to Perl This six-part tutorial covers the basics, aiming to impart practical knowledge quickly. Here we look at the basic syntax, for more detailed documentation the link is helpful. To execute the script we write: $ perl perl_ We add the following code: #!/usr/bin/perl On the Linux command-line, we can execute a Perl program as follows: $ perl -e "print 'hello world' "
Perl programing language install#
However, if Perl is not installed, we can install as shown in article. We can check for the Perl version currently installed by writing: $ perl -v
Perl programing language how to#
We look at how to run Perl in Linux, the basic Perl syntax, variables and variable scoping, and operators used with Perl. Perl is a general-purpose programing language that finds applications in various areas. In this article, we go over a brief introduction to Perl. Perl is a general-purpose programming language, it is used in text processing and manipulation, systems administration, network programming, GUI development, web development just to name a few. Object-oriented programming including generics, roles and multiple dispatch Functional programming primitives, lazy and eager list evaluation, junctions.
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