The thing is directory "work" also needs to be created first and then work/startup.Is the below "if condition" right to check if a directory "work" already exists?

if (  ! -e 'work' )#Is this condition right?
          {
    print "creating work/startup directory\n";
    mkdir 'work' or do {
        print "create install directory failed because :$!\n";
        exit 1; 
    };
    mkdir 'work/startup' or do {
        print "create work/startup directory failed because :$!\n";
        exit 1;
    };
}
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