saving files in a folder

I am trying to save some data named (cn,y,z) into the directory with folder, vfolder. I expect the file (cn,y,z) to be contained in Pzz5X10. I keep getting errors anytime I run the code below. Any help will be appreciated.

Thanks.

zz = '10';

f = '5';

vfolder = pwd;

save([vFolder,'\' 'Pzz'+f+'X'+zz.mat'],'cn','y','z');

Answer 1

[Stephen23]

save([vFolder,'\'  'Pzz'+f+'X'+zz.mat'],'cn','y','z');
%                              ^^^^^^^ invalid syntax

Better:

fnm = sprintf('Pzz%dX%d.mat',5,10);
save(fullfile(vFolder,fnm),'cn','y','z')

[Kofi Agyemang Amankwah]

thanks. please, can you resolve the issue by retaining the format i used?