Delve into Perl, a popular text processing language. Gain insights into loops, strings, and arrays, progressing to complex data structures and packages. No prior knowledge required.

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

Deletes value from the front of an array.

What does a <code>shift()</code> function do?

Adds passed key at the front of an array.

Adds passed value at the end of an array.

What does a <code>push</code> function do?

What will be the output of the following code:
```perl
  @arr = (2,4,5,9);
	unshift(@arr,14,15);
	print "@arr";
```

What will be the output of the following code:
<pre><code class="language-perl"> @arr = (2,4,5,9);
	unshift(@arr,14,15);
	print &quot;@arr&quot;;
</code></pre>

What will be the output of the following code:
```perl
  @arr=(2,4,5,9);
	push(@arr,14,15);
	print "@arr";
```

What will be the output of the following code:
<pre><code class="language-perl"> @arr=(2,4,5,9);
	push(@arr,14,15);
	print &quot;@arr&quot;;
</code></pre>

What will be the output of the following code:
```perl
@arr=(1,3,5,7,9,11);
shift(@arr);
print "@arr";
```

What will be the output of the following code:
<pre><code class="language-perl">@arr=(1,3,5,7,9,11);
shift(@arr);
print &quot;@arr&quot;;
</code></pre>

What will be the output of the following code:
```perl
@arr=(1,3,5,7,9,11);
pop(@arr);
print "@arr";
```

What will be the output of the following code:
<pre><code class="language-perl">@arr=(1,3,5,7,9,11);
pop(@arr);
print &quot;@arr&quot;;
</code></pre>

What will be output of the following code:
```perl
@numbers = (-22, 4, 1, 20, 0, -44);
@sorted_numbers = sort { $a <=> $b } @numbers;
print "@sorted_numbers";
```

What will be output of the following code:
<pre><code class="language-perl">@numbers = (-22, 4, 1, 20, 0, -44);
@sorted_numbers = sort { $a &lt;=&gt; $b } @numbers;
print &quot;@sorted_numbers&quot;;
</code></pre>

Practice concepts of arrays learned in this chapter by solving a quiz in this lesson.

Getting Started

Variables

Operators

Conditional Statements

Loops

Subroutines

Strings

Arrays

Packages

Conclusion

Quiz 2