alpine2.tar.gz

Perl is one of the most popular text processing languages in the world. It allows you to create extremely efficient text parsers for all sorts of applications.

This interactive course will help you get up to speed on Perl, starting off with basic concepts like loops, strings, and arrays. You'll build your way up to more complex topics like data structures and packages.

No background knowledge is needed. Anyone willing to understand the principles and syntax of Perl to use it in the future will find this course useful.

Learn Perl from Scratch

A subroutine needs a subroutine definition to perform a specific task.

A subroutine needs a subroutine definition to perform a specific task.

A local variable declared in a subroutine is usable outside that subroutine.

A local variable declared in a subroutine is usable outside that subroutine.

What is the value displayed at the end of the following subroutine?
```perl
sub fun {
	 $n = @_[0];
	 if ($n == 4) {
   		return $n;
   }
   else{
   return 2 * $n;
   }
}
print fun(3);

```

What is the value displayed at the end of the following subroutine?
<pre><code class="language-perl">sub fun {
	 $n = @_[0];
	 if ($n == 4) {
 		return $n;
 }
 else{
 return 2 * $n;
 }
}
print fun(3);

</code></pre>

What is the correct way to create a subroutine in Perl?



What is the correct way to create a subroutine in Perl?

Test your understanding of subroutines in Perl by solving a quiz in this lesson. 

Quiz on Subroutines

Test your understanding of subroutines in Perl by solving a quiz in this lesson.

Getting Started

Variables

Operators

Conditional Statements

Loops

Subroutines

Strings

Arrays

Packages

Conclusion

Quiz on Subroutines