How to joining 2 variables in other variable
<p>See the example to understand</p>

<pre><code>int rnd = rand() %10;
string Folder = "c://foldername";
string final_name = Folder + rnd; // here the target

/* I want the result like that (random folder name)
foldername5
foldername10
foldername3
foldername20
foldername17
*/
</code></pre>
