In this task, the job is to create a new empty file called "output.txt" of size 0 bytes
and an empty directory called "docs". This should be done twice: once "here", i.e. in the current working directory and once in the filesystem root.

 
SetDirectory@NotebookDirectory[];
t = OpenWrite["output.txt"]
Close[t]
s = OpenWrite[First@FileNameSplit[$InstallationDirectory] <> "\\output.txt"]
Close[s]
 
(*In root directory*)
CreateDirectory["\\docs"]
(*In current operating directory*)
CreateDirectory[Directory[]<>"\\docs"]
(*"left<>right" is shorthand for "StringJoin[left,right]"*)
 
 