C:\Users\pmu>perl
'perl' is not recognized as an internal or external command,
operable program or batch file.

C:\Users\pmu>powershell
Windows PowerShell
Copyright (C) 2009 Microsoft Corporation. All rights reserved.

PS C:\Users\pmu> perl --version

This is perl 5, version 24, subversion 1 (v5.24.1) built for MSWin32-x86-multi-thread-64int

Copyright 1987-2017, Larry Wall

Perl may be copied only under the terms of either the Artistic License or the
GNU General Public License, which may be found in the Perl 5 source kit.

Complete documentation for Perl, including FAQ lists, should be found on
this system using "man perl" or "perldoc perl".  If you have access to the
Internet, point your browser at http://www.perl.org/, the Perl Home Page.

PS C:\Users\pmu> exit

C:\Users\pmu>perl
'perl' is not recognized as an internal or external command,
operable program or batch file.

C:\Users\pmu>