function myFunction() { let sheetData = SpreadsheetApp.getActiveSpreadsheet() .getSheetByName("Data") .getDataRange() .getValues(); for (let i = 1; i < sheetData.length; i++) { Logger.log(sheetData[i][0]); } SpreadsheetApp.getActiveSpreadsheet() .getSheetByName("Data") .getDataRange() .setValues(sheetData); }