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

What is the output of the following code?
```perl
$myvar = 5;
print $myvar++;
```

What is the output of the following code?
<pre><code class="language-perl">$myvar = 5;
print $myvar++;
</code></pre>

What is the output of the following code?
```perl
$aa = 5;
$bb = 3;
print ($aa**$bb);
```

What is the output of the following code?
<pre><code class="language-perl">$aa = 5;
$bb = 3;
print ($aa**$bb);
</code></pre>

What is the ouput of the following expression?

```perl
print "42 + 7 % 2 = ". (42 + 7 % 2) ;

```

What is the ouput of the following expression?
<pre><code class="language-perl">print &quot;42 + 7 % 2 = &quot;. (42 + 7 % 2) ;

</code></pre>

What is the result of the following code?
```perl

$aa = 5;
$bb = 2;
$cc = 4;

if ( $aa < $bb+$cc ) {
 print $aa <=> ( $cc-$bb );
}
else {
 print ( $cc-$bb ) <=> $aa;
}
```

What is the result of the following code?
<pre><code class="language-perl">
$aa = 5;
$bb = 2;
$cc = 4;

if ( $aa &lt; $bb+$cc ) {
 print $aa &lt;=&gt; ( $cc-$bb );
}
else {
 print ( $cc-$bb ) &lt;=&gt; $aa;
}
</code></pre>

What is the result of the following code?
```perl
$aa = true;
$bb = false;
$cc = true;
if ( $aa && $bb || $cc || !$cc) {
    print ("inside if");
}
else {
    print ("inside else");
}
```

What is the result of the following code?
<pre><code class="language-perl">$aa = true;
$bb = false;
$cc = true;
if ( $aa &amp;&amp; $bb || $cc || !$cc) {
 print (&quot;inside if&quot;);
}
else {
 print (&quot;inside else&quot;);
}
</code></pre>

What will the following program print?
```perl
$aa = 2;
$bb = 3;
$bb = ($aa += ($bb **= 5)); 
print "\$bb = ".$bb;
```

What will the following program print?
<pre><code class="language-perl">$aa = 2;
$bb = 3;
$bb = ($aa += ($bb **= 5)); 
print &quot;\$bb = &quot;.$bb;
</code></pre>

Let's check your knowledge of operators in Perl.

Getting Started

Variables

Operators

Conditional Statements

Loops

Subroutines

Strings

Arrays

Packages

Conclusion

Quiz on Operators