How to create a folder if it doesn't exist?

Question

I\'m trying to create a folder if it doesn\'t exist, but the code creates a new folder every time I run it. I don´t know if my code is right.

Here is my code:

Answer 1

You actually don't need the if condition when you use a try/catch structure. The try/catch structure handles the case where the folder doesn't exist by itself.

Try it like this:

var alumnopath = DocsList.getFolderById ('0Bzgw8SlR34pUbFl5a2tzU2F0SUk');
var alumno2 = alumno.toString();
Logger.log(alumno2);
try{
  var folderalumno =  alumnopath.getFolder(alumno2);
}
catch(e) {
  var folderalumno =  alumnopath.createFolder(alumno2);
}
folderalumno.createFile(pdf.getAs('application/pdf')).rename(  alumno +  " , " + fechafor);