How to change the Height of Multiple rows at Once? - google-apps-script

Question

How do I change the height of multiple rows at once via Google Apps Script?
Attempt:
function resizeHeight() {
  var s = SpreadsheetApp,
      ui = s.getUi(),
  sh = s.getActiveSheet(),
curntRow = s.getActiveRange().getRow(),
rowsMany = s.getActiveRange().getNumRows(),
autoRangeRows = s.getActiveRange().getA1Notation().replace(/[a-z]/gi,""),
  getVal = ui.prompt('⿱⇕', 'Change the height of row❓   Cancel. Back to default❗  (21)', ui.ButtonSet.OK_CANCEL),
  Btn = getVal.getSelectedButton(), Txt = getVal.getResponseText();
for (var i=curntRow; i<=rowsMany+1; i++) {
if (Btn == 'OK') {
if (autoRangeRows.search(":") == -1) {sh.setRowHeight(curntRow, Txt);}
else {sh.setRowHeight(i, Txt);}
}
if (Btn == 'CANCEL') {
if (autoRangeRows.search(":") == -1) {sh.setRowHeight(curntRow, 21);}
else {sh.setRowHeight(i, 21);}
}
}
}
Problem:
The script is not very effective they only work on the part or a few rows but not on all rows can be implemented.

Answer 1

This function works: You just have to pick an active range to select the rows that you want to change the height of and then give it a height in pixels in the prompt.
function changeRowHeight()
{
var ss=SpreadsheetApp.getActiveSpreadsheet();
var sht=ss.getActiveSheet()
var rng=sht.getActiveRange();
var row=rng.getRow();
var numrows=rng.getNumRows();
var resp=SpreadsheetApp.getUi().prompt('Get Row Height', 'Enter Row Height in Pixels', SpreadsheetApp.getUi().ButtonSet.OK);
var height = Number(resp.getResponseText());
for(var i=0;i<numrows;i++)
{
sht.setRowHeight(row + i, height)
}
}