I wanna save text as txt file in my desktop or any location I choose

Text='hello' [file, path] =uiputfile('text. Txt')

[dpb]

You intended more like

Text='hello';
[file, path] =uiputfile([Text '.txt']);

maybe?

Answer 1

[Walter Roberson]

Text='hello';
[file, pathdir] = uiputfile('text. Txt');
if isempty(file); return; end  %user cancel
fullname = fullfile(pathdir, file);
[fid, msg] = fopen(fullname, 'wt');
if fid < 0
    error('Failed to open file "%s" because "%s"', fullname, msg);
end
fprintf(fid, '%s\n', Text);
fclose(fid);