Factorial in Perl

Factorial

in Perl

Welcome to the Factorial in Perl page! Here, you'll find the source code for this program as well as a description of how the program works.

Current Solution

#!/usr/bin/env perl
use v5.42;

sub usage {
    say "Usage: please input a non-negative integer";
    exit;
}

my ($number) = @ARGV;
usage() unless defined $number && $number =~ /\A\d+\z/;

my $factorial = 1;
$factorial *= $_ for 2 .. $number;

say $factorial;

Factorial in Perl was written by:

• Gabriela Kandová
• Ștefan-Iulian Alecu

If you see anything you'd like to change or update, please consider contributing.

How to Implement the Solution

No 'How to Implement the Solution' section available. Please consider contributing.

How to Run the Solution

No 'How to Run the Solution' section available. Please consider contributing.