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

If  \$x=3 , \$y=4, and \$z=6, what is the value of \$x, \$y, and \$z after executing the following code?
```perl
if ($y+2 == $z) { 
	$x = $x+1; 
}
else {
	$z++;
}
```

If $x=3 , $y=4, and $z=6, what is the value of $x, $y, and $z after executing the following code?
<pre><code class="language-perl">if ($y+2 == $z) { 
	$x = $x+1; 
}
else {
	$z++;
}
</code></pre>

If originally \$x=2, \$y=1, and \$z=3, what is the value of \$x, \$y, and \$z after executing the following code?
```perl
if($y) {
	$x = $x+1;
	$z= $x+$y;
}
else { 
	$y--;
}
```

If originally $x=2, $y=1, and $z=3, what is the value of $x, $y, and $z after executing the following code?
<pre><code class="language-perl">if($y) {
	$x = $x+1;
	$z= $x+$y;
}
else { 
	$y--;
}
</code></pre>

Ternary operator has one boolean expression, and returns one of two values depending on the value of a Boolean expression.

Ternary operator has one boolean expression, and returns one of two values depending on the value of a Boolean expression.

What will be displayed on the console when the code below is executed?
```perl
$x = 30, $y = 20;
$result = ($x > $y) ? $x : $y;
print $result;
```

What will be displayed on the console when the code below is executed?
<pre><code class="language-perl">$x = 30, $y = 20;
$result = ($x &gt; $y) ? $x : $y;
print $result;
</code></pre>

If originally \$x=1, \$y=2, and \$z=3, what is the value of \$x, \$y, and \$z after executing the following code?

```perl
$x = 2;
given($x) {
  when (1){ 
  			$x++;
        $z=$x+1;
  }
  when (2) { 
  			$y=$z+$x;
  }
  default { 
  			$z=$z+$x;
  }
} 
```

If originally $x=1, $y=2, and $z=3, what is the value of $x, $y, and $z after executing the following code?
<pre><code class="language-perl">$x = 2;
given($x) {
 when (1){ 
 			$x++;
 $z=$x+1;
 }
 when (2) { 
 			$y=$z+$x;
 }
 default { 
 			$z=$z+$x;
 }
} 
</code></pre>

Test your understanding of the conditional statements in Perl by solving a short quiz in this lesson. 

Quiz on Conditional Statements

Test your understanding of the conditional statements in Perl by solving a short quiz in this lesson.

Getting Started

Variables

Operators

Conditional Statements

Loops

Subroutines

Strings

Arrays

Packages

Conclusion

Quiz on Conditional Statements