7-Get contents of a folder

Drive-7

// Log the name of every folder in the user's Drive
function example71() {
  const folders = DriveApp.getFolders();
  while (folders.hasNext()) {
    var folder = folders.next();
    Logger.log(folder.getName());
  }
}

//Get folder names within a specific folder
function example72() {
  const parentFolder = DriveApp.getFolderById('ADD YOU FOLDER ID HERE');
  const folders = parentFolder.getFolders();
  while (folders.hasNext()) {
    var folder = folders.next();
    Logger.log(folder.getName());
  }
}

//Change all folder names within a specific folder
function example73() {
  const parentFolder = DriveApp.getFolderById('ADD YOU FOLDER ID HERE');
  const folders = parentFolder.getFolders();
  var n = 0;
  while (folders.hasNext()) {
    var folder = folders.next();
    n++;
    folder.setName("FOLDER " + n);
  }
}

//Get specific folder by name, get its ID
//make a copy of a file and add it in that folder
function example74() {
  const parentFolder = DriveApp.getFolderById('ADD YOU FOLDER ID HERE');
  const folders = parentFolder.getFolders();
  while (folders.hasNext()) {
    var folder = folders.next();
    if (folder.getName() === "FOLDER 3") {
      var folderId = folder.getId();
      var folder3 = DriveApp.getFolderById(folderId);
      const masterFile = DriveApp.getFileById('ADD YOU DOCUMENT ID HERE');
      masterFile.makeCopy("New Doc", folder3);
    }
  }
}

//Get file names in a folder
function example75() {
  const parentFolder = DriveApp.getFolderById('ADD YOU FOLDER ID HERE');
  const files = parentFolder.getFiles();
  while (files.hasNext()) {
    var file = files.next();
    Logger.log(file.getName());
  }
}