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based on an earlier version of the Wolfram Language.
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ToFileName

ToFileName["directory", "name"]
assembles a full file name from a directory name and a file name.
ToFileName[{dir1, dir2, ...}, name]
assembles a full file name from a hierarchy of directory names.
ToFileName[{dir1, dir2, ...}]
assembles a single directory name from a hierarchy of directory names.
  • ToFileName works differently on different computer systems.
  • ToFileName just creates a file name; it does not actually search for the file specified.
Provide operating system dependent file name:
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