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An entire Perl program may also be specified as a command-line parameter to Perl, so the same program can also be executed from the command line (example shown for Unix): $ perl - e 'print "Hello, World!\n"'
This includes Perl itself, nearly all publicly released modules, many scripts, most design documents, many articles on Perl.com and other Perl-related web sites, and the Parrot virtual machine. Pod is rarely read in the raw, although it is designed to be readable without the assistance of a formatting tool.
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).
An example of the printf function. printf is a C standard library function that formats text and writes it to standard output.. The name, printf is short for print formatted where print refers to output to a printer although the functions are not limited to printer output.
There are also functions for producing HTML or XHTML output, but these are now unmaintained and are to be avoided. [1] CGI.pm was a core Perl module but has been removed as of v5.22 of Perl. [ 1 ] The module was written by Lincoln Stein and is now maintained by Lee Johnson.
Pretty-printing (or prettyprinting) is the application of any of various stylistic formatting conventions to text files, such as source code, markup, and similar kinds of content. These formatting conventions may entail adhering to an indentation style , using different color and typeface to highlight syntactic elements of source code, or ...
It is common for Perl modules to have embedded documentation in Perl's Plain Old Documentation format. POD imposes little structure on the author. POD imposes little structure on the author. It is flexible enough to be used to write articles, web pages and even entire books such as Programming Perl .
For example, the following Perl one-liner will reverse all the bytes in a file: perl -0777e 'print scalar reverse <>' filename While most Perl one-liners are imperative, Perl's support for anonymous functions, closures, map, filter (grep) and fold (List::Util::reduce) allows the creation of 'functional' one-liners.