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Learn how to declare, define, call, and use subroutines in Perl, with examples and explanations. See how to use signatures, prototypes, attributes, autoloading, and more features of subroutines.
Learn how to define, call, and return values from subroutines in Perl, a group of statements that perform a task. See examples of passing scalars, arrays, hashes, and lists to subroutines, and how to use private variables with my operator.
13 lip 2018 · The word subroutines is used most in Perl programming because it is created using keyword sub. Whenever there is a call to the function, Perl stop executing all its program and jumps to the function to execute it and then returns back to the section of code that it was running earlier.
Learn how to create and use subroutines in Perl, which are blocks of reusable code that can take parameters and return values. See the syntax, attributes, attributes and examples of subroutines in this tutorial.
Like many languages, Perl provides for user-defined subroutines. These may be located anywhere in the main program, loaded in from other files via the do, require, or use keywords, or generated on the fly using eval or anonymous subroutines. You can even call a function indirectly using a variable containing its name or a CODE reference.
See perlsub and perlref for details about subroutines and references; see attributes and Attribute::Handlers for more information about attributes.
Like many languages, Perl provides for user-defined subroutines. These may be located anywhere in the main program, loaded in from other files via the do, require, or use keywords, or even generated on the fly using eval or anonymous subroutines (closures).
