The [doc://mkdir] function creates directories (which I assume are what you mean by "subfolders"). The [doc://open] function can open files even if you prepend a path to them. If you want to create multiple directories in one go, have a look at [cpan://File::Path].

use strict;
use warnings;

my $outdir = "output";

if (! -d $outdir) {
    warn "Creating '$outdir'";
    mkdir $outdir
        or die "Couldn't create '$outdir': $!";
};

my $outname = "$outdir/test.txt";
open my $outfile, ">", $outname
    or die "Couldn't create '$outname' : $!";
print $outfile, "Hello World\n";

Re^2: How do I create subfolders?

bart

created: 2006-04-02 06:47:32

perlmonks

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prlmnks

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If you want to create multiple directories in one go, have a look at File::Path.

Corion is not saying it with so many words, but he is talking about the function mkpath(), in File::Path, which comes with Perl.

Have a look at File:Path

To answer the second part of your question, how to navigate the directories you create, the chdir command may be helpful to change your working directory.