(TIP) Making a file name appending number in Matlab

It is simple and easy but I can not remember the code well when I need this code.
So I leave this code in my blog.
And I hope the code is also useful to all visitor.
Thank you.

endIndex = 10;
for j=1:endIndex
     Index = num2str(j);
     dataD = strcat(Index,'saveFile.txt')
     data = load(dataD);
end

->
This source code can load below file names sequentially.
1saveFile.txt
2saveFile.txt
3saveFile.txt
4saveFile.txt
5saveFile.txt
6saveFile.txt
7saveFile.txt
...