Selecting the last value of a column

Question

I have a spreadsheet with some values in column G. Some cells are empty in between, and I need to get the last value from that column into another cell.

Something li

Answer 1

function lastRow(column){
  var sheet = SpreadsheetApp.getActiveSpreadsheet();
  var lastRow = sheet.getLastRow();
  var lastRowRange=sheet.getRange(column+startRow);
  return lastRowRange.getValue();
}

no hard coding.