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Perl is a high-level, general-purpose, interpreted, dynamic programming language. Though Perl is not officially an acronym, [9] there are various backronyms in use, including "Practical Extraction and Reporting Language". [10] Perl was developed by Larry Wall in 1987 [11] as a general-purpose Unix scripting language to make report processing ...
The structure of the Perl programming language encompasses both the syntactical rules of the language and the general ways in which programs are organized. Perl's design philosophy is expressed in the commonly cited motto " there's more than one way to do it ".
#!usr/bin/perl – called the "shebang line", after the hash symbol (#) and ! (bang) at the beginning of the line. It is also known as the interpreter directive. # – the number sign, also called the hash symbol. In Perl, the # indicates the start of a comment. It instructs perl to ignore the rest of the line and not execute it as script code.
Perl is an open-source programming language whose first version, 1.0, was released in 1987. The following table contains the Perl 5 version history , showing its release versions. Not all versions are covered yet.
Programming Perl, best known as the Camel Book among programmers, [1] is a book about writing programs using the Perl programming language, revised as several editions (1991–2012) to reflect major language changes since Perl version 4.
Perl provides three loop control keywords that all accept an optional loop label as an argument. If no label is specified, the keywords act on the innermost loop. Within nested loops, the use of labels enables control to move from an inner loop to an outer one, or out of the outer loop altogether.
Perl Programming Documentation, also called perldoc, is the name of the user manual for the Perl 5 programming language. It is available in several different formats, including online in HTML and PDF. The documentation is bundled with Perl in its own format, known as Plain Old Documentation (pod).
Perl is a language allowing many different styles of programming. A developer is as likely to find a module written in a procedural style (for example, Test::Simple ) as object-oriented (e.g. XML::Parser ), both are considered equally valid according to what the module needs to do.