What are values and what are variables?
- [Voiceover] In Perl, a variable…contains one or more values.…A value is a unit of data.…It may be numeric, textural, or logical.…A variable is simply a named container…for one or more values.…Perl doesn't use types in the same way…that some other languages use types.…To distinguish between integers, floats,…and text, Perl uses context to determine type.…This is a system called Duck Typing.…In other words, if it quacks like a duck,…it must be a duck.…
So if a value is used as a number,…Perl will treat it as a number.…If it's used as a string, Perl will treat it as a string.…This actually works surprisingly well…and for most purposes, you'll never need…anything more sophisticated.…A variable name may consist of any combination…of characters but it's generally considered…good practice to restrict your variable names…to the set of lowercase and uppercase Roman letters,…the 10 ASCII decimal digits and the underscore symbol.…
Perl provides three basic storage types.…A scalar holds a single value.…A scalar variable is introduced with the dollar symbol.…
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
- Mark as unwatched
- Mark all as unwatched
Are you sure you want to mark all the videos in this course as unwatched?
This will not affect your course history, your reports, or your certificates of completion for this course.Cancel
Take notes with your new membership!
Type in the entry box, then click Enter to save your note.
1:30Press on any video thumbnail to jump immediately to the timecode shown.
Notes are saved with you account but can also be exported as plain text, MS Word, PDF, Google Doc, or Evernote.