How to Use the Perl Compiler

To use the Perl Compiler, follow these steps:

  1. In the code editor, write your Perl code.
  2. Click the "RUN" button to compile and run your code.
  3. The output will be displayed in the console below the code editor.

Taking Inputs

In Perl, you can take inputs from the user in various ways. Here are some examples:

String Input

print "Enter a string: ";
my $input = <STDIN>;
chomp $input;
print "You entered: $input\n";

Number Input

print "Enter a number: ";
my $num = <STDIN>;
chomp $num;
print "You entered: $num\n";

Importing Libraries

Perl has a rich set of built-in libraries that can be used in your programs. Here are some examples:

Using the Math::Complex Library

use Math::Complex;

my $result = sqrt(25);
print "Square root of 25 is $result\n";

Using the List::Util Library

use List::Util qw(min max);

my @arr = (5, 2, 8, 7, 1);
print "Minimum: ", min(@arr), "\n";
print "Maximum: ", max(@arr), "\n";

Syntax 101

Perl is a high-level, general-purpose, interpreted, dynamic programming language. Here's a primer on the major syntax basics of Perl:


Variables in Perl can be scalars ($), arrays (@), or hashes (%).

my $name = "John Doe"; # Scalar variable
my @ages = (20, 25, 30); # Array variable
my %fruit_color = ("apple", "red", "banana", "yellow"); # Hash variable

Control Structures

Perl includes control structures such as if, else, for, while, and unless.

# If-Else
if ($age > 18) {
    print "Adult\n";
} else {
    print "Minor\n";

# For loop
for my $i (0..4) {
    print "$i\n";

# While loop
my $i = 0;
while ($i < 5) {
    print "$i\n";

# Unless
unless ($day eq "Saturday" or $day eq "Sunday") {
    print "Work day\n";


Functions in Perl are called subroutines and are defined with the sub keyword.

sub greet {
    my ($name) = @_;
    print "Hello, $name\n";

greet("John Doe"); # Calls the function with "John Doe" as the argument

Perl Online Test

A Perl online test is an effective way to assess an individual's Perl programming skills. These tests typically include a mix of theoretical questions and practical coding challenges. By attempting these tests, candidates can demonstrate their understanding of Perl concepts, their problem-solving abilities, and their proficiency in writing efficient code. Perl online tests are commonly used in technical interviews, coding bootcamps, and online learning platforms to gauge a learner's understanding and proficiency in Perl.