PS C:\Users\me> C:\EX_D\ulisseDUE\perl5.24.64bit\portableshell.bat
----------------------------------------------
 Welcome to Strawberry Perl Portable Edition!
 * URL - http://www.strawberryperl.com/
 * see README.TXT for more info
----------------------------------------------
Perl executable: C:\EX_D\ulisseDUE\perl5.24.64bit\perl\bin\perl.exe
Perl version   : 5.24.2 / MSWin32-x64-multi-thread

C:\Users\me>perl -e "print $^O;"
MSWin32                                                              # good 'ol expected behaviour
C:\Users\me>
C:\Users\me>
C:\Users\me>perl -e 'print $^O;'
Can't find string terminator "'" anywhere before EOF at -e line 1.   # no more single quote allowed