RosettaCodeData/Task/Rename-a-file/REALbasic/rename-a-file.basic

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Sub Renamer()
Dim f As FolderItem, r As FolderItem
f = GetFolderItem("input.txt")
'Changing a FolderItem's Name attribute renames the file or directory.
If f.Exists Then f.Name = "output.txt"
'Files and directories are handled almost identically in RB.
f = GetFolderItem("docs")
If f.Exists Then f.Name = "mydocs"
'Jump through hoops to find the root directory.
r = RootDir(GetFolderItem("."))
f = r.Child("input.txt")
'Renaming in a different directory identical to renaming in current directory.
If f.Exists Then f.Name = "output.txt"
f = r.Child("docs")
If f.Exists Then f.Name = "mydocs"
End Sub
Function RootDir(what As FolderItem) As FolderItem
'RB doesn't have an easy way to find the root of the current drive;
'not an issue under *nix but troublesome under Windows.
If what.Parent <> Nil Then 'Nil = no parent = root.
Return RootDir(what.Parent) 'Recursive.
Else
Return what
End If
End Function