Learn how to use arithmetic operators in Perl.
- [Voiceover] The basic arithmetic operators…include addition, subtraction, multiplication, and division,…and also for our purposes, I'm including the modulo operator…as it returns the remainder of integer division.…And I'm gonna start by,…my cursor in the right place,…and we'll just declare a few variables.…my $x,…give that a value of 47.…And $y will be four.…And now I can do something like…say $x plus $y,…and when I run that, we get 51, which is the correct answer.…
And if I say x minus y,…we get 43.…That's what we expect.…Or x times y, with the asterisk.…Get 188.…And x divided by y,…we get 11.75.…Now you notice there's a fractional part here,…the 0.75, which will be three-quarters.…Or after dividing 47 by 4, there would be…a remainder of three, so if I say modulo,…then I have that three.…
That's the percent sign for the modulus operator.…Now if I want to do actual integer division,…because remember here we're getting,…with the divide operator, we're getting the fractional part.…If I want to do actual integer division,…
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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