Learn how to return values from a function.
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- Exercise Files
- Return values are very simple in Perl.…You may return zero or more scalar values as a list.…Here's a working copy of func.pl from Chapter 10…of the exercise files and what I'm going to do here,…is I'm going to take away this say and I'm…going to replace it with a return.…So instead of displaying the string from inside of…the function, I'm just going to display it from outside…of the function, I'm going to put the say here.…So the return value of the function is being passed…to say and you'll notice when I run it, it does…exactly the same thing, it displays its…value but it's working differently.…
Now it's returning the scalar variable with the string in it…and it's passing that to say outside of the function.…So this is very simply how you return a value.…Now if you want to, you can return more than one value.…You can return a list,…and then I can just say foreach, like that,…it'll pass that list to foreach and…call say for each value in the list.…When I run this, it says one, two,…three, four, five on each different line.…
Watch to learn the details of the Perl syntax, from variables, conditionals, loops, and data structures to regular expressions, functions, and references. A quick-start guide is included for experienced developers who want to get up and running with Perl 5 fast, and the entire course is recommended for both new and experienced programmers alike. Later chapters cover file handling and reusing code with Perl modules, plus Perl best coding practices.
- Understanding Perl's general syntax and the anatomy of a Perl script
- Writing statements and expressions
- Creating assignments
- Working with variables and strings
- Using data types effectively
- Defining logical flow with conditionals and loops
- Using special variables
- Using Perl operators
- Performing simple Perl programming tasks with expressions
- Matching data
- Defining and calling functions
- Using references
- Handling files in the file I/O
- Using built-in functions
- Reusing code with modules
- Coding with Perl best practices
Skill Level Intermediate
Foundations of Programming: Refactoring Codewith Simon Allardice1h 44m Intermediate
1. Setting Up
About Perl3m 36s
2. Quick Start
3. Basic Syntax
4. Values and Variables
7. Special Variables
9. Regular Expressions
11. References and Structures
12. File I/O
13. Built-In Functions
15. Best Practices
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