function createMultipleEvents() {
const ws=SpreadsheetApp.getActiveSpreadsheet();
const ss=ws.getActiveSheet();
for(var i=3;i<=ss.getLastRow();i++) {
const created = ss.getRange(i,8).getValue();
if (created != "Event created") {}
const eventName=ss.getRange(i,6).getValue();
const location=ss.getRange(i,7).getValue();
const startingDate=ss.getRange(i,3).getValue();
var endingDate=ss.getRange(i,4).getValue();
CalendarApp.createEvent(eventName,startingDate,endingDate,{location:location, sendInvites:true})
ss.getRange(i,9).setValue("Event created")
}
}
function menuCreation(){
SpreadsheetApp.getUi().createMenu("Add to Calendar").addItem("Generate all events","createMultipleEvents").addToUi();
}