WolframLang: Init Dir, Library Dir

User's Library Dir

$UserBaseDirectory

Directory path for user files.

On Microsoft Windows, it's typically at one of the following, depending on which product you have:

• "~/AppData/Roaming/Mathematica"
• "~/AppData/Roaming/WolframDesktop"
• "~/AppData/Roaming/Wolfram"

on macOS, typically at:

• ~/Library/Mathematica

on linux, typically at:

• ~/.Mathematica

it typically includes the following subdirectories:

• ApplicationData
• Applications → for typical packages.
• Autoload → auto load. aka init files.
• FrontEnd
• Kernel
• Knowledgebase
• Licensing
• Logs
• Paclets
• SystemFiles

most of these dirs are automatically added to the file loading search path, i.e. $Path. 〔see WolframLang: Search Paths for Loading File〕

$UserBaseDirectory