Create table from sheet data

In this example, I have created a flextable, whose cells are populated by the data from a Spreadsheet.


Spreadsheet Preview from which data is loaded in table:

Example Code:
function doGet(){
  var app = UiApp.createApplication();
  var panel = app.createVerticalPanel();
  var flexTable = app.createFlexTable().setStyleAttribute('border', '1px solid black')
  //Get Data from spreadsheet
  var spreadsheetId = 't2Hx-ohk6E_DhtexDElvySA';//Change it to your Spreadsheet ID
  var dataArray = getData(spreadsheetId);
 //Load data into table cells 
  for (var row = 0; row<dataArray.length; row++){
    for (var col = 0; col<dataArray[row].length; col++){
      flexTable.setText(row, col, dataArray[row][col].toString());
  return app;

function getData(spreadsheetId){
 var ss = SpreadsheetApp.openById(spreadsheetId);
  var sheet = ss.getSheets()[0].getDataRange();
  return sheet.getValues();