provides the path separator used in the PATH environment variable of the current OS.
s = pathsep()
";" on Windows,
or ":" on Linux.
--> pathsep()
ans =
";"
--> getenv PATH
"C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\OpenSSH\; ..."
--> tokens(getenv("PATH"), pathsep())
ans =
"C:\Windows\system32"
"C:\Windows"
"C:\Windows\System32\Wbem"
"C:\Windows\System32\OpenSSH\"
"C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common"
"C:\Program Files\NVIDIA Corporation\NVIDIA NGX"