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+#!/usr/bin/env perl
+# Author: Steven Wilson
+# Date: 2020-01-08
+# Week: 042
+# Task #1
+# Octal Number System
+# Write a script to print decimal number 0 to 50 in Octal Number System.
+
+# For example:
+
+# Decimal 0 = Octal 0
+# Decimal 1 = Octal 1
+# Decimal 2 = Octal 2
+# Decimal 3 = Octal 3
+# Decimal 4 = Octal 4
+# Decimal 5 = Octal 5
+# Decimal 6 = Octal 6
+# Decimal 7 = Octal 7
+# Decimal 8 = Octal 10
+
+use strict;
+use warnings;
+use feature qw/ say /;
+use Test::More tests => 1;
+
+ok( decimal_to_octal(1792) == 3400, "test decimal 1792 is octal 3400" );
+
+sub decimal_to_octal {
+    my $dec = shift;
+    my $result;
+    while ( $dec > 7 ) {
+        $result .= $dec % 8;
+        $dec = int( $dec / 8 );
+    }
+    $result .= $dec;
+    return scalar reverse $result;
+}
+
+for ( 0 .. 50 ) {
+    say "Decimal $_ = Octal ", decimal_to_octal($_);
+}