Determining the last row in a single column

Question

I have a sheet with data in cols A through H.

I need to determine the last row in column A that contains data (it\'s all conti

Answer 1

I am using getDataRange() followed by getNumRows(). The first function

Returns a Range corresponding to the dimensions in which data is present

and the second function

Returns the number of rows in this range.

var ss = SpreadsheetApp.getActiveSpreadsheet();
var ws = ss.getActiveSheet();
var lastRow = ws.getDataRange().getNumRows();

P.S I hope this works for all cases.

Answer 2

I realise this is quite an old thread but it's one of the first results when searching for this problem.

There's a simple solution to this which afaik has always been available... This is also the "recommended" way of doing the same task in VBA.

var lastCell = mySheet.getRange(mySheet.getLastRow(),1).getNextDataCell(
  SpreadsheetApp.Direction.UP
);

This will return the last full cell in the column you specify in getRange(row,column), remember to add 1 to this if you want to use the first empty row.

Answer 3

personally I had a similar issue and went with something like this:

function getLastRowinColumn (ws, column) {
  var page_lastrow = ws.getDataRange().getNumRows();
  var last_row_col = 0
  for (i=1; i<=page_lastrow;i++) {
    if (!(spread.getRange(column.concat("",i)).isBlank())) {last_row_col = i};
  }
  return last_row_col
}

It looks for the number of rows in the ws and loops through each cell in your column. When it finds a non-empty cell it updates the position of that cell in the last_row_col variable. It has the advantage of allowing you to have non-contiguous columns and still know the last row (assuming you are going through the whole column).

Answer 4

Here's an alternative way of solving this. It uses a while loop but takes into consideration empty gaps between rows.

function getLastRow (column) {
  var iLastRow = ss.getActiveSheet().getMaxRows();
  var aValues = ss.getActiveSheet().getRange(column + ":" + column).getValues();
  var row = "";
  while(row == ""){
    row = aValues[iLastRow-1];
    iLastRow--;
  }
  return iLastRow;
}

Answer 5

To get the number of columns or last column's index:

var numColumns = sheet.getLastColumn()

To get the no of rows or last row's index:

var numRows = sheet.getLastRow()

where

var sheet = SpreadsheetApp.getActiveSheet()

Answer 6

After a while trying to build a function to get an integer with the last row in a single column, this worked fine:

    function lastRow() {
    var spreadsheet = SpreadsheetApp.getActiveSheet();
    spreadsheet.getRange('B1').activate();
    var columnB = spreadsheet.getSelection().getNextDataRange(SpreadsheetApp.Direction.DOWN).activate();
    var numRows = columnB.getLastRow();
    var nextRow = numRows + 1; 
    }