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system 'cmd.exe /c notepad.exe' || die 'no notepad'; # is the same as ... system( 'cmd.exe /c notepad.exe' ) && die 'no notepad'; # or you could do system 'cmd.exe /c notepad.exe' and die 'no notepad';
0 == system 'cmd.exe /c notepad.exe' or die 'no notepad';