Discover how the range operator works in Perl.
- [Voiceover] The Perl range operator…returns a list of values according to a given range.…Here's a working copy of range.pl…from Chapter 8 of the exercise files.…The range operator, you'll see it down here in line 7.…It's those two dots in the the foreach clause right there.…in the foreach clause right there.…The range operator takes two values.…The left-hand value is the lower bound of the range…and the right-hand value is the upper bound of the range.…The range operator returns a list including all values…from the lower to the upper,…including the values of the two operands.…
When I run this, you'll notice that I get…a list of these values starting with 1 and ending with 10.…If I want to, I can create a couple of variables here:…my $lower, and I'm going to give that a letter a…and my $upper, and I'm going to give that…a letter zed or z…and I'm just going to change these to…$lower and $upper.…
The range can be numbers, it can be strings,…it can be individual letters, and it'll do its best…to operate sequentially and to give you rational values.…
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
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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