File Perl

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#!/usr/bin/perl
use strict;
use warnings;
print "Creating a file with the numbers 0-9.\n";
open FILE, "+>file.txt" or die "Unable to open file: $!\n";
print FILE "0\n1\n2\n3\n4\n5\n6\n7\n8\n9\n";
close FILE or die "Unable to open file: $!\n";