//Create folders, add one folder to another folder
function example41() {
  const parentFolder = DriveApp.getFolderById('ADD FOLDER ID HERE');
  const folder1 = parentFolder.createFolder("EXAMPLE41-FOLDER1");
  const folder2 = parentFolder.createFolder("EXAMPLE41-FOLDER2");
  folder1.addFolder(folder2);
}

//Get 2 folders by their IDs and remove one folder from within the other one
function example42() {
  const folder1 = DriveApp.getFolderById('ADD FOLDER ID HERE');
  const folder2 = DriveApp.getFolderById('ADD FOLDER ID HERE');
  folder1.removeFolder(folder2);
}

//Create folders, create file, add file to another folder
function example43() {
  const parentFolder = DriveApp.getFolderById('ADD FOLDER ID HERE');
  const folder3 = parentFolder.createFolder("EXAMPLE43-FOLDER3");
  const folder4 = parentFolder.createFolder("EXAMPLE43-FOLDER4");
  const file = folder3.createFile("EXAMPLE43-NEW FILE",
                                  "This will be a file in two folders",
                                  MimeType.PLAIN_TEXT);
  folder4.addFile(file);
}

//Create folders, create file, add file to another folder
function example44() {
  const folder4 = DriveApp.getFolderById('ADD FOLDER ID HERE');
  const file = DriveApp.getFileById('ADD FILE ID HERE');
  folder4.removeFile(file);
}

//Make Google Doc, move from My Drive to folder using add and remove
function example45() {
  var newDoc = DocumentApp.create("EXAMPLE45-New Google Doc");
  var newDoc = DriveApp.getFileById(newDoc.getId());
  const parentFolder = DriveApp.getFolderById('ADD FOLDER ID HERE');
  const example45Folder = parentFolder.createFolder("EXAMPLE45");
  example45Folder.addFile(newDoc);
  DriveApp.removeFile(newDoc);
}