Palindromic Number in Perl

Welcome to the Palindromic Number 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

# accept an integer, reverse it, compare it with original
# print true, if original and reversed number are same
# print false, if original and reversed number are same
#!/usr/bin/env perl
use strict;
use warnings;

# no input
usage() unless @ARGV == 1;

# accept input as argument
my ($number) = @ARGV;

# if not provided, read from standard input
if (!defined $number) {
	$number = <STDIN>;
	chomp $number;
}

if (!defined $number || $number !~ /^\d+$/ || $number < 0) {
	usage();
}

my $temp = $number;
my $noofdigits = 0;
my $reversed_number = 0;
while ($temp > 0){
  $reversed_number = ($reversed_number * 10) + ($temp % 10);
  $temp = int($temp / 10);
  $noofdigits += 1;
}

if ($number < 0){
  print("Usage: please input a non-negative integer")
}

else{
  if ($reversed_number == $number){
    print("true");
    }
  else{
    print("false");
  }

}

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

Palindromic Number in Perl was written by:

• Jeremy Grifski
• manasmithamn

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

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