var a=new Array(); var dic=new Array(); function myFunction() { id="1ySTEGyN5gkqNGam26OfwicpsVhTfi1XG1hNvl4WJT6Y"; var ex = SpreadsheetApp.openById(id); var sh = ex.getSheetByName("data"); number= sh.getLastRow(); var v=sh.getRange(1,1,number,3).getValues(); for(s=1;s<number+1;s++){ a[s]=v[s-1][2]; } dicnumber=0; dic[0]=""; for(s=1;s<number+1;s++){ c1=""+a[s]; sx=dic.indexOf(c1); if(sx<0)dicnumber=dicnumber+1 if(sx<0)dic[dicnumber]=c1; } Logger.log(dicnumber); }